Fix shader bool generics to appear in the editor

[Basewq]

PR Details

Bug in editor where declaring a shader, eg.

shader MyShader<bool ShaderArg>
{
}

won't show the bool argument in the editor when used as a material shader, and you won't be able to build the shader due to the missing parameter.

This fix exposes the bool argument to the editor and allows it to save/load properly.

Also added a separate commit to simplify the type checking.

Types of changes

• [ ] Docs change / refactoring / dependency upgrade
• [X] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [ ] My change requires a change to the documentation.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.
• [X] I have built and run the editor to try this change out.

[Eideren]

Thanks !