Sunshine: integrate Virtual Display Driver

### Is there an existing issue for this item?

- [x] I have searched the existing issues

### Repositories

LizardByte/Sunshine

### Languages/Skills/Technologies

C++, Windows, Linux, macOS

### Description

This has been a highly requested feature for Sunshine.

### Estimated Effort

effort:Extra-Large

### Priority

priority:High

### Target Milestone

6+ months

### Dependencies

_No response_