No SM6/dxc support

[MarkaRagnos0815]

I am writing shaders in for sm6.6 and above using dxc. The tool does not recognize any SM6 function and does not support any language feature like templating etc.

[paulbartrum]

Yes, this project is unfortunately woefully out of date. I've heard (unofficially) that MS have plans to introduce an official Language Server Protocol extension for HLSL as part of their currently underway effort to incorporate HLSL into Clang. If that's true we should get totally up-to-date syntax highlighting in VS at some point. No idea on the timeline but it can't come soon enough IMO!