Add plane.Side overload that takes a Vec4

- Fix plane.Side function

Bugfix: Plane constructor

- Add Sign utility function

added inverse function to mat4

Bugfix: Fix wrong sign in Plane.side(point) function

Add __AMATH_ prefix to all include guards to avoid collisions with other libraries

Unroll some loops

Unroll matrix multiplications

add Rider .idea folder to gitignore

git ignore update

Prevent division by 0 in affine transformations

- Unify matrix and vector tests in same file

bugfix: include vec2.h in mat3.h

Upload matrix and vector unit testsf