Add and run pre-commit config

[WSSDude]

Requires Python 3.x with pip installed. Should be documented if someone wants to use it, as pre-commit hooks in general have to be set up manually after check-out, no way to automate this even if it did not use Python.

This should be executed in terminal opened inside the cloned repo folder to install and start using it (is one time, auto-updated after):
pip install pre-commit && pre-commit install

NOTE: Review by commit

• first is just the config
• second is output from running the config (probably no need to check every single thing, it seems all are trailing white-space apart from clang-format getting applied on few files)
• fourth is adding the info to CONTRIBUTING.md on how to set up pre-commit
• fifth is fixing reflection so new dumps do not have the trailing whitespace issue
• sixth is refresh of natives after all of the changes above with RTTIDumper
• seventh excludes vendor folder from all pre-commit hook stages and reverts changes that were done by second commit in vendor

[wopss]

Thank you! Is it possible to disable the hooks for vendor directory?

[WSSDude]

Let me try to run the RTTIDumper quickly to check the last commit and I believe this should be clean 👍

[WSSDude]

@wopss Seems the generation is clean now 👍
But the RTTIDumper detected one changed variable name in natives... Included the change in separate commit.

Also a bit unsure after I saw Natives.cpp if it should not be including *-inl.hpp files instead tbh 🤔 But left that one as-is.

[WSSDude]

Thank you! Is it possible to disable the hooks for vendor directory?

Oh and to this - excluded, sorry... Fell out of mind when it was not a review comment 😄

Fixed in latest commit

[wopss]

@wopss Seems the generation is clean now 👍 But the RTTIDumper detected one changed variable name in natives... Included the change in separate commit.

Also a bit unsure after I saw Natives.cpp if it should not be including *-inl.hpp files instead tbh 🤔 But left that one as-is.

We don't have -inl.hpp files which are generated, That's why it doesn't include them.

[wopss]

Thank you!