feat: Add experimental rewrite of go2rtc live provider (MSE/WebRTC/MP4/MJPEG) (#2580)

- Closes #2556
- Closes #2450

**Key intended features:**
 - go2rtc compatible
- 100% test coverage to significantly improve ability to test, maintain
and work around browser weirdnesses (e.g. Safari).
 - Written from the ground up in the style of the rest of the project.

**To use:**
 - Change `live_provider` from `go2rtc` to `go2rtc-experimental`.

src/editor.ts

@@ -2595,6 +2595,10 @@ export class AdvancedCameraCardEditor extends LitElement implements LovelaceCard
         value: 'go2rtc',
         label: localize('config.cameras.live_providers.go2rtc'),
       },
+      {
+        value: 'go2rtc-experimental',
+        label: localize('config.cameras.live_providers.go2rtc-experimental'),
+      },
       {
         value: 'webrtc-card',
         label: localize('config.cameras.live_providers.webrtc-card'),