add annotation / type_comment to node.args of visit_Lambda
I'm debug for this test file:

bin/py2many --dlang=1 tests/build/lambda.py

https://github.com/py2many/py2many/blob/39ccbcc573f37ac9ad806554f9cf225f0fbc69ec/tests/cases/lambda.py#L13

It has the type info: 

```Callable[[int, int], int]```

and I stopped here:

https://github.com/py2many/py2many/blob/39ccbcc573f37ac9ad806554f9cf225f0fbc69ec/pyd/transpiler.py#L141

```
(Pdb) p node.args.args[0].__dict__
{'arg': 'x', 'annotation': None, 'type_comment': None, 'lineno': 9, 'col_offset': 47, 'end_lineno': 9, 'end_.col_offset': 48, 'scopes': [<ast.Module object at 0x74b8dd1c4100>, <ast.FunctionDef object at 0x74b8dd1c7400>]}
```

The type info is gone.

I think we need this type info here to generate better code.

Right now even cpp only use `auto` as a detour:

```
  auto myfunc = [](auto x, auto y) { return x + y; };
```
