Proposal: Merge improvements from my Collisionhook fork

[A1mDev]

What do you think about fork? Should it be merged in whole or in part with this repository?
It has several differences:

1. Dynamic hook activation depending on whether they are used or not.
2. Fixed a crash on Windows because the call occurs in different threads, which is not supported by source spawn.
3. Retrieving the original result of a game function in a plugin. The original function is called anyway, unless the plugin blocks it.
4. Optimizations – removed unnecessary checks and streamlined code for better performance.

[voided]

I definitely welcome those changes - if but to provide a single source of truth for the extension. Feel free to send over a PR or I can invite you to the project. Let me know!

I also saw your comment about ABI compat for the PassServerEntityFilterFunc hook - do you have any ideas about handling that? More ifdefs per engine?

[A1mDev]

I'll make a PR for compatibility with other games besides TF2, but I'd like to check if it actually breaks other games, I just don't see anyone reporting it :(

[voided]

I can test it for TF2 - the rest will have to be user reported whenever it happens. 🤷