Port CameraPreview

[niels9001]

### Base Porting Checklist
- [x] Component name (to `CommunityToolkit.WinUI.Controls.CameraPreview`)
- [x] Design refresh
- [x] Merge differences from UWP main to WinAppSDK / Uno forks
- [ ] Support for WASM via Uno Platform
- [x] Improve Samples
- [ ] All brought over tests pass for UWP/WinAppSDK

### Known Issues

### Improvements

Notable Changes

N/A