Scrubber UI component (#9036)

* add scrubber and ui playground when running dev

* fix mobile dropdown menu width

* timeline scrubber and revamp for all event handlers

web/package.json

@@ -53,6 +53,7 @@
     "tailwindcss-animate": "^1.0.7",
     "video.js": "^8.6.1",
     "videojs-playlist": "^5.1.0",
+    "vis-timeline": "^7.7.3",
     "vite-plugin-monaco-editor": "^1.1.0",
     "zod": "^3.22.4"
   },