[workstream] Matrix Support

[damyanp]

Relies on the LLVM Matrix extension: https://clang.llvm.org/docs/MatrixTypes.html.
As with all the other work documented here, SPIR-V support will be added throughout.

Render Mesh (#15)

• Matrix declaration
• Matrix swizzle accessors
• Constrain matrix sizes using concepts
• Elementwise matrix operations
  • Includes various __builtin_elementwise* functions
• Matrix/Matrix multiplication is supported using the LLVM matrix extensions
  • Requires changing existing behavior of * operator for HLSL
• Matrix row/column-major layouts
  • Allow type qualifiers, pragmas, conversions
• Matrix Load/Store

Pixel and Vertex Shaders (#16)

• Matrix Initialization

Mesh Shaders (#17)

• Groupshared matrices

Ray Tracing (#18)

• Support ObjectToWorld and WorldToObject matrices

V1 Release (#19)

• Boolean matrices
• Optimizations such as constant propagation are being applied to matrices.
• [HLSL] Matrix Support llvm-project#88060