Unable to generate bindings/reflection data

**EDIT**: Ok the second part seems to be some sort of a regression in current Nim-Devel `writeFile`. The file does get written out even with the index not in range exception. :) So just the first part of this issue is relevant.

---

Two issues I've found (current `devel`):

1) `IsRunningCommandlet` as defined [in this commit](https://github.com/jmgomez/NimForUE/commit/a360244781f67be5df704cd4280e77a5c1a783a9#diff-315186f9bfe2fabd46fbc51b5b1602e4874e359651f220eb6b60be7449bb0929)

is always `false`, so `genBindingsEntryPoint()` doesn't do anything. I've changed it to 
```nim
proc isRunningCommandlet*() : bool {.importcpp:"IsRunningCommandlet" .}
```
and all the relevant call sites and seems to work as expected.

2) `generateProject()` fails with the following error:
```
[2023.07.06-08.48.21:196][  1]NimForUEBindings: [genreflectiondatav2.nim:596]: All module names@["NimTemplate", "NimForUE", "NimForUEBindings", "NimForUETest", "NimForUEEditor", "ModelingToolsEditorMode", "Engine/Exporters", "Engine/EdGraph", "Engine/Atmosphere", "Engine/Sound", "Engine/AI", "Engine/Kismet", "Engine/Camera", "Engine/GameFramework", "Engine/Components", "Engine/Animation", "Engine/VT", "Engine/Elements", "Engine/Slate", "Engine/Instances", "Engine/ISMPartition", "Engine/SparseVolumeTexture", "Engine/Engine", "Engine/Materials", "Engine/Net", "Engine/Enums", "Engine/DataDrivenCVars", "Engine/Particles", "Engine/PhysicsEngine", "Engine/Haptics", "Engine/ActorPartition", "Engine/Delegates", "Engine/Commandlets", "Engine/PhysicalMaterials", "Engine/Lightmass", "Engine/EditorFramework", "Engine/Physics", "Engine/Distributions", "Engine/Curves", "Engine/WorldPartition", "Engine/VectorField", "Slate", "SlateCore", "PhysicsCore", "Chaos", "InputCore", "UMG/Slate", "UMG/FieldNotification", "UMG/UMG", "UMG/Components", "UMG/Animation", "UMG/Delegates", "UMG/Enums", "UMG/Blueprint", "GameplayAbilities/GameplayAbilities", "GameplayAbilities/Serialization", "GameplayAbilities/Abilities", "GameplayAbilities/Delegates", "GameplayAbilities/Enums", "GameplayAbilities/Sequencer", "EnhancedInput", "AssetRegistry", "Engine/Common"]
[2023.07.06-08.48.21:442][  1]NimForUEBindings: Error: [ffinimforue.nim:66]: Error in genBindingsEntryPoint: index -1 not in 0 .. 88
[2023.07.06-08.48.24:449][  1]LogCore: Engine exit requested (reason: Commandlet GenerateBindingsCommandlet_0 finished execution (result 0))
[2023.07.06-08.48.24:450][  1]LogInit: Display: 
[2023.07.06-08.48.24:450][  1]LogInit: Display: Warning/Error Summary (Unique only)
[2023.07.06-08.48.24:450][  1]LogInit: Display: -----------------------------------
[2023.07.06-08.48.24:450][  1]LogInit: Display: NimForUEBindings: Error: [genreflectiondatav2.nim:473]: CodeGenOnlyUEImportRule(affectedTypes: @["AActor", "AInfo", "UReflectionHelpers", "UObject", "UEngine", "APawn", "UField", "UStruct", "UScriptStruct", "UPackage", "UPackageMap", "UClass", "UFunction", "UDelegateFunction", "UEnum", "AVolume", "UInterface", "UActorComponent", "AController", "AGameMode", "AGameModeBase", "UBlueprint", "UBlueprintGeneratedClass", "APlayerController", "UAnimBlueprintGeneratedClass", "UEngineSubsystem", "USubsystem", "UDynamicSubsystem", "UWorldSubsystem", "USceneComponent", "UPrimitiveComponent", "UWorld", "UInputComponent", "UEnhancedInputComponent", "UInputAction", "UPlayerInput", "UEnhancedPlayerInput", "UPhysicalMaterial", "UTickableWorldSubsystem", "UGameViewportClient", "UNavigationSystemConfig", "UNavigationSystemModuleConfig", "UFunctionCaller", "FNativeFuncPtr", "UNimScriptStruct", "UNimScriptStructPtr", "UNimEnum", "UNimEnumPtr", "UNimFunction", "UNimFunctionPtr", "UReflectionHelpers", "UReflectionHelpersPtr", "FNimTestBase", "FNimHotReload", "FNimHotReloadPtr", "FField", "FFieldPtr", "FProperty", "FPropertyPtr", "FFieldClass", "FFieldClassPtr", "FFieldPath", "UObject", "UObjectPtr", "UField", "UFieldPtr", "UEnum", "UEnumPtr", "UStruct", "UStructPtr", "FObjectInitializer", "FReferenceCollector", "UClassConstructor", "VTableConstructor", "FOutParmRec", "FFrame", "UClassAddReferencedObjectsType", "UFunctionNativeSignature", "FImplementedInterface", "FUObjectCppClassStaticFunctions", "UClass", "UClassPtr", "UInterface", "UInterfacePtr", "UScriptStruct", "UScriptStructPtr", "ICppStructOps", "ICppStructOpsPtr", "UFunction", "UFunctionPtr", "UDelegateFunction", "UDelegateFunctionPtr", "TObjectPtr", "TLazyObjectPtr", "TEnumAsByte", "TWeakObjectPtr", "TScriptInterface", "UWorld", "UWorldPtr", "ConstructorHelpers", "FObjectFinder", "FClassFinder", "TSubclassOf", "TFieldPath", "FVTableHelper", "FPropertyChangedEvent", "FPropertyChangedChainEvent", "FObjectPostSaveRootContext", "FScriptArray", "FScriptArrayHelper", "FScriptMap", "FScriptMapHelper", "FScriptMapLayout", "FFieldVariant", "DelegateProp", "ERenameFlag", "TFieldIterator", "FRawObjectIterator", "ScriptContainer", "FAssetBundleData", "FAssetBundleEntry", "FSoftObjectPath", "FAssetData", "FAutomationEvent", "FGuid", "EAutomationEventType", "FAutomationExecutionEntry", "FDateTime", "FBox", "FBox2D", "FVector2D", "FBox2f", "FVector2f", "FBox3d", "FVector3d", "FBox3f", "FVector3f", "FBoxSphereBounds", "FBoxSphereBounds3d", "FBoxSphereBounds3f", "FColor", "FDirectoryPath", "FFallbackStruct", "FFilePath", "FFloatInterval", "FFloatRange", "FFloatRangeBound", "ERangeBoundTypes", "FFrameNumber", "FFrameNumberRange", "FFrameNumberRangeBound", "FFrameRate", "FFrameTime", "FInt32Interval", "FInt32Range", "FInt32RangeBound", "FInterpCurveFloat", "FInterpCurvePointFloat", "EInterpCurveMode", "FInterpCurveLinearColor", "FInterpCurvePointLinearColor", "FLinearColor", "FInterpCurvePointQuat", "FQuat", "FInterpCurvePointTwoVectors", "FTwoVectors", "FInterpCurvePointVector", "FInterpCurvePointVector2D", "FInterpCurveQuat", "FInterpCurveTwoVectors", "FInterpCurveVector", "FInterpCurveVector2D", "FIntPoint", "FIntVector", "FMatrix", "FPlane", "FMatrix44d", "FPlane4d", "FMatrix44f", "FPlane4f", "FOrientedBox", "FPackedNormal", "FPackedRGB10A2N", "FPackedRGBA16N", "FPolyglotTextData", "ELocalizedTextSourceCategory", "FPrimaryAssetId", "FPrimaryAssetType", "FQualifiedFrameTime", "FQuat4d", "FQuat4f", "FRandomStream", "FRotator", "FRotator3d", "FRotator3f", "FSoftClassPath", "FTestUninitializedScriptStructMembersTest", "FTimecode", "FTimespan", "FTransform", "FTransform3d", "FTransform3f", "FVector4", "FVector4d", "FVector4f", "ELifetimeCondition", "ELifetimeRepNotifyCondition", "ESearchCase", "ESearchDir", "ELogTimes", "EAxis", "EPixelFormat", "EMouseCursor", "EUnit", "EPropertyAccessChangeNotifyMode", "EAppReturnType", "EAppMsgType", "EDataValidationResult", "UPackage", "UPackagePtr", "TSoftObjectPtr", "TSoftClassPtr", "FName", "EName", "FMulticastScriptDelegate", "FScriptDelegate", "FStaticConstructObjectParameters", "UMetadata", "UMetadataPtr", "TChar", "FString", "TArray", "TPair", "TMap", "TSet", "ELogVerbosity", "FVector", "FVector_NetQuantize", "FVector_NetQuantizeNormal", "FVector_NetQuantize100", "FVector_NetQuantize10", "FText", "FWeakObjectPtr", "FDelegateHandle", "FDelegateHandlePtr", "TMulticastDelegateOneParam", "TDelegateRetOneParam", "IAssetRegistry", "UEngine", "UEnginePtr", "USubsystem", "USubsystemPtr", "UDynamicSubsystem", "UDynamicSubsystemPtr", "UEngineSubsystem", "UEngineSubsystemPtr", "FTickFunction", "FActorTickFunction", "AActor", "AActorPtr", "AController", "AControllerPtr", "APlayerController", "APlayerControllerPtr", "APawn", "APawnPtr", "AInfo", "AInfoPtr", "AGameModeBase", "AGameModeBasePtr", "AGameMode", "AGameModePtr", "UActorComponent", "UActorComponentPtr", "USceneComponent", "USceneComponentPtr", "UPrimitiveComponent", "UPrimitiveComponentPtr", "UBlueprint", "UBlueprintPtr", "UBlueprintGeneratedClass", "UBlueprintGeneratedClassPtr", "UAnimBlueprintGeneratedClass", "UAnimBlueprintGeneratedClassPtr", "UAsyncActionLoadPrimaryAssetBase", "UAsyncActionLoadPrimaryAssetBasePtr", "ASceneCapture", "ASceneCapturePtr", "AVolume", "AVolumePtr", "UWorldSubsystem", "UWorldSubsystemPtr", "UTickableWorldSubsystem", "UTickableWorldSubsystemPtr", "FWorldContext", "FWorldContextPtr", "FHitResult", "FLifetimeProperty", "FGameplayTag", "UPackageMap", "UPackageMapPtr", "FKey", "FPlatformUserId", "FTopLevelAssetPath", "FARFilter", "EInputDeviceConnectionState", "FTableRowBase", "FObjectPreSaveContext", "FViewport", "FViewportPtr", "UGameViewportClient", "UGameViewportClientPtr", "FActorInstanceHandle", "UPhysicalMaterial", "UPhysicalMaterialPtr", "UMaterialInterface", "UMaterialInterfacePtr", "UUserDefinedStruct", "UUserDefinedStructPtr", "UNavigationSystemModuleConfig", "UNavigationSystemModuleConfigPtr", "UNavigationSystemConfig", "UNavigationSystemConfigPtr", "FSlateBrush", "EGetWorldErrorMode", "ETriggerEvent", "UInputComponent", "UInputComponentPtr", "UEnhancedInputComponent", "UEnhancedInputComponentPtr", "UInputAction", "UInputActionPtr", "UPlayerInput", "UPlayerInputPtr", "UEnhancedPlayerInput", "UEnhancedPlayerInputPtr", "FEnhancedInputActionEventBinding", "FInputActionValue", "FKeyEvent", "FkeyEventPtr", "FInputKeyEventArgs", "FInputKeyEventArgsPtr", "FInputDeviceId", "EInputEvent", "FOnInputKeySignature", "OnInputKeyEventPressedNimSignature", "OnKeyPressedNimSignature", "EAxisList", "ECollisionChannel", "EObjectTypeQuery", "ETraceTypeQuery", "FActorSpawnParameters", "Criteria", "SomePointer", "SomeTable", "EPropertyFlags", "EObjectFlagsVal", "EObjectFlags", "EFunctionFlags", "EClassFlags", "EClassCastFlags", "EStructFlags", "EFieldIterationFlags"], target: uertType.UERuleTarget, rule: uerCodeGenOnlyFields)
[2023.07.06-08.48.24:450][  1]LogInit: Display: NimForUEBindings: Error: [ffinimforue.nim:66]: Error in genBindingsEntryPoint: index -1 not in 0 .. 88
```

I've added a bunch of logging to pinpoint the error and it seems to be this piece of code:
```nim
writeFile(config.reflectionDataFilePath, codeTemplate % [ueProjectAsStr])
```
or, rather, more specifically, the string interpolation part: `codeTemplate % [ueProjectAsStr]`.

I could paste the contents of `ueProjectAsStr` (in a Gist since it is huge) if that would be helpful.


Additional info:
Unreal Engine 5.2.1