feat(win): new capture method, Windows.Graphics.Capture

[tez011]

Description

This adds a capture backend on Windows that uses the Windows.Graphics.Capture API. This is a more recent API that's capable of capturing the Xbox Game Bar, which the DXGI Desktop Duplication API seemingly cannot do.

This pull request depends on C++20 compiler support (for the Microsoft WinRT headers, which define this API) as well as Universal CRT runtime support. These have already been integrated into Sunshine in #2322 and #2323.

See also #2149.

Issues Fixed or Closed

Fixes #832 (manually verified)

Screenshot

Issues Fixed or Closed

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Dependency update (updates to dependencies)
• [x] Documentation update (changes to documentation)
• [x] Repository update (changes to repository files, e.g. .github/...)

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

Branch Updates

LizardByte requires that branches be up-to-date before merging. This means that after any PR is merged, this branch must be updated before it can be merged. You must also Allow edits from maintainers.

• [x] I want maintainers to keep my branch updated