[RFE] Add reflection data

[dzhdanNV]

Reasons:

• an important prerequisite for a "bit more automated" render graph
• or at least to add more "automation" into code

Thoughts:

• most likely 1 GAPI-agnostic data for 1 shader in a separate file / entity (assuming same source code for DXBC, DXIL and SPIRV)
• blobs and headers should be supported