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.

package.json

@@ -20,7 +20,8 @@
     "@design.estate/dees-domtools": "^2.5.4",
     "@design.estate/dees-element": "^2.2.4",
     "@push.rocks/smartdelay": "^3.0.5",
-    "lit": "^3.3.2"
+    "lit": "^3.3.2",
+    "mediabunny": "^1.40.1"
   },
   "devDependencies": {
     "@api.global/typedserver": "^8.4.6",
@@ -59,5 +60,11 @@
     "element testing",
     "page development"
   ],
-  "packageManager": "pnpm@10.11.0+sha512.6540583f41cc5f628eb3d9773ecee802f4f9ef9923cc45b69890fb47991d4b092964694ec3a4f738a420c918a333062c8b925d312f42e4f0c263eb603551f977"
+  "packageManager": "pnpm@10.11.0+sha512.6540583f41cc5f628eb3d9773ecee802f4f9ef9923cc45b69890fb47991d4b092964694ec3a4f738a420c918a333062c8b925d312f42e4f0c263eb603551f977",
+  "pnpm": {
+    "overrides": {
+      "@types/dom-webcodecs": "./ts_web/types/dom-webcodecs-stub",
+      "@types/dom-mediacapture-transform": "./ts_web/types/dom-mediacapture-stub"
+    }
+  }
 }