feat: vendor Discord video stream workspace

Add Discord-video-stream as a vendored workspace dependency and wire it to use the local selfbot package for development.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

package.json

@@ -23,6 +23,7 @@
   "dependencies": {
     "@discordjs/opus": "^0.10.0",
     "@discordjs/voice": "^0.19.1",
+    "@dank074/discord-video-stream": "workspace:*",
     "@snazzah/davey": "^0.1.10",
     "@types/pg": "^8.20.0",
     "@vitejs/plugin-react": "^6.0.2",