feat(recording): add output format options and MP4 conversion support

- Introduced `outputFormat` state in `WccRecordingPanel` for selecting between MP4 and WebM formats.
- Updated `RecorderService` to handle MP4 conversion using mediabunny.
- Added type stubs for `MediaStreamAudioTrack` and `MediaStreamVideoTrack` to ensure type safety.
- Updated documentation to reflect changes in output format handling.

pnpm-lock.yaml

@@ -4,6 +4,10 @@ settings:
   autoInstallPeers: true
   excludeLinksFromLockfile: false
 
+overrides:
+  '@types/dom-webcodecs': ./ts_web/types/dom-webcodecs-stub
+  '@types/dom-mediacapture-transform': ./ts_web/types/dom-mediacapture-stub
+
 importers:
 
   .:
@@ -20,6 +24,9 @@ importers:
       lit:
         specifier: ^3.3.2
         version: 3.3.2
+      mediabunny:
+        specifier: ^1.40.1
+        version: 1.40.1
     devDependencies:
       '@api.global/typedserver':
         specifier: ^8.4.6
@@ -3115,6 +3122,9 @@ packages:
   mdurl@2.0.0:
     resolution: {integrity: sha512-Lf+9+2r+Tdp5wXDXC4PcIBjTDtq4UKjCPMQhKIuzpJNW0b96kVqSwW0bT7FhRSfmAiFYgP+SCRvdrDozfh0U5w==}
 
+  mediabunny@1.40.1:
+    resolution: {integrity: sha512-HU/stGzAkdWaJIly6ypbUVgAUvT9kt39DIg0IaErR7/1fwtTmgUYs4i8uEPYcgcjPjbB9gtBmUXOLnXi6J2LDw==}
+
   memory-pager@1.5.0:
     resolution: {integrity: sha512-ZS4Bp4r/Zoeq6+NLJpP+0Zzm0pR8whtGPf1XExKLJBAczGMnSi3It14OiNCStjQjM6NU1okjQGSxgEZN8eBYKg==}
 
@@ -8621,6 +8631,11 @@ snapshots:
 
   mdurl@2.0.0: {}
 
+  mediabunny@1.40.1:
+    dependencies:
+      '@types/dom-mediacapture-transform': link:ts_web/types/dom-mediacapture-stub
+      '@types/dom-webcodecs': link:ts_web/types/dom-webcodecs-stub
+
   memory-pager@1.5.0: {}
 
   micromark-core-commonmark@2.0.3: