Lua cartridge support
Would this be useful for anyone? Lua seems to be the lingua franca of fantasy consoles, so it might help drive adoption?

Implementation-wise it would be a little different since it's interpreted. We could provide a prebuilt cart.wasm written in C containing the Lua runtime. The *.lua files would then be injected into this cart.wasm somehow to produce the final cart.

The nice thing about this approach is that Lua carts would require no compiler toolchain to setup.