libobs/graphics: Add float2x2 and float3x3 support

[exeldro]

Description

Add float2x2 and float3x3 support

Motivation and Context

Support more for shaders. This pull request helps obs-shaderfilter detecting types used so that it can provide better guidance on how to make the shader work for OBS.

How Has This Been Tested?

On windows 64 by loading shaders with these types.

Types of changes

• Tweak (non-breaking change to improve existing functionality)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[kkartaltepe]

You didn't add a matrix2x2 parameter handler?

[exeldro]

We don't have a struct matrix2 yet, I don't need it and see it as outside of the scope of this pull request.

[kkartaltepe]

What is the purpose of matrix2x2 parameters in this pull request, if its not to enable passing a matrix2x2 parameter?

[exeldro]

This pull request helps obs-shaderfilter detecting types used so that it can provide better guidance on how to make the shader work for OBS.

[Lain-B]

One thing I wanted to note is that your motivation/context section should try to make sure to specify why you're adding a feature or want a feature you're submitting in the motivation/context, such as something specific you're building or something specific you're trying to do. It's good to have the full context and motivation behind a change. If you've already specified it in another PR or issue, then you can just link to that prior PR/issue where motivation was specified.