feat: Add Audio Gallery screen and integrate into Debug Tools menu

feat: Implement audio playback controls and audio management in the gallery
refactor: Update audio engine interface to include stopAllAudio method

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

.vscode/settings.json

@@ -1,6 +1,7 @@
 {
   "cmake.ignoreCMakeListsMissing": true,
   "chat.tools.terminal.autoApprove": {
-    "flutter": true
+    "flutter": true,
+    "dart": true
   }
 }