Adds `std::formatter` specializations for `Mat`, `Vector2`, `Vector3`, and `Vector4` types, enabling the use of `std::format` for these types.
This simplifies formatting and printing of these mathematical objects, improving code readability and consistency.
Also adds a hash function specialization for Vector3.
Updates unit tests to include more accurate assertions for camera projections.
Adds .idea/workspace.xml to .gitignore to prevent tracking local IDE settings.
Refactors some test fixture class names for consistency.
