Support comfy.comfy_types.node_typing

In my custom node code I've got this import line
```
from comfy.comfy_types.node_typing import IO, ComfyNodeABC
```
to be able to use data types like `IO.BOOLEAN`.

The validation is now failing with `❌ Error loading nodes: No module named 'comfy'`.

How do I have to configure my repository to make this test work?

Start with the repository's node validation entry point and reproduce the import error from the custom node code. Inspect how validation resolves the `comfy` package; done means the `comfy.comfy_types.node_typing` import loads successfully and the validation no longer reports `No module named 'comfy'`.

Written by the indexing model from the issue text.