Moving reflection from ShaderProgram into a separate module

It might make change to move the code for shader reflection into a separate module because of licensing reasons. It would also reduce the core dependencies of the framework quite a bit.

added 🔧 Refactoring label

I've cleaned up the shader reflection quite a bit now, fixing multiple issues and reducing its overall code base. So it's not that much of a problem from maintenance PoV. I'd say moving it has low priority.