[API-535] test Docs py code blocks for correct API signatures

[9and3]

Propose a basic first mini PyTest framework to test the sanity of the documentation (scraped from #AICW-17). For now the only proposed test checks if Cadwork symbols used in the Python blocks from examples/ section have up-to-date API signatures, in the following way:

1. detect the symbols in the py code blocks
2. compare it with the stubs signatures
3. raise exception if signature is different and propose 2 possible matches from stubs

E.g. in current state this file, containing isWall in the last py code block will be raised as an error and fail the action (left the typo just for showcase).

PS: I agree that the best would be to run the examples in the python code, I do not see how rn, maybe in future..

[CLAassistant]

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