Refactor the math module

[isHarryh]

Summary

This PR has undergone comprehensive optimizations and fixes for the math module.

Breaking Changes

1. Complete implementation for Vector2 and Vector4. (According to Vector3.)
2. Remove the file Half.py since the only function ToHalf in this file is not used any more. (ToHalf was used in the Texture2DConvertor in the earlier version of UnityPy, but this usage has been removed in later versions.)

Common Changes

1. Type hints.
2. Use @dataclass decorator for all classes. (Before this PR, only Vector3 had this decorator.)
3. Use __truediv__ (Python 3) to replace __div__ (Python2).
4. Argument type validation.
5. Avoid duplicate __eq__ method declarations.
6. Remove unnecessary comments at the end of the file.

Individual Optimizations

1. Vector3: Use Method = method to redirect duplicated method.
2. Vector3: Use a better __eq__ method (which is also Unity's implementation).
3. Quaternion: Remove the redundant self._data field.
4. Color: Use a better __eq__ method.

Individual Fixes

1. Vector3: Incorrect if-statement in __init__ method.
2. Vector3: Incorrect else-body in normalize method.
3. Vector3: Incorrect LengthSquare method.
4. Quaternion: The w value of the identity quaternion (default quaternion) is 1.0, not 0.0.
5. Matrix4x4: Corrupted __eq__ method.

[K0lb3]

Just one change

[K0lb3]

Thanks for the PR and fixes.

I'm also rewriting and pruning these classes for the next minor patch,
so you might have ended up wasting some time, sorry for taking a bit too long with that patch.

For the version 2 update I plan to include numpy....and for that the math classes are going to get another rewrite,
subtyping them from the np.ndarray class, making them directly compatible with numpy functions.

But that's still some time off,
as I will have to focus on other things in the next months.
So thanks a lot for these changes and fixes.

[isHarryh]

No problem at all! The simple work didn’t take long, happy to help. Good luck with the UnityPy 2 updates!

[K0lb3]

Thanks a lot 👍