Add tvOS A/V sync diagnostics on its own settings page

Surface audio-delay (±10/±100 ms) and video-sync-mode controls behind an
"A/V Sync" navigation row in Advanced settings rather than inline, keeping the
Advanced page uncluttered. Audio delay applies live to the running MPV
instance; sync mode takes effect on next playback.

Yattee.xcodeproj/xcshareddata/xcodecloud/manifest.json

@@ -0,0 +1,9 @@
+{
+  "id" : "8948cba2-509e-4ad8-bcb9-592de5bff7d1",
+  "targets" : [
+    {
+      "id" : "9FC1C0A4-CE29-437C-BB50-C93FE779B691",
+      "name" : "Yattee"
+    }
+  ]
+}