Add Discord-native hybrid front-end for Jarvis (bot + bridge)

Transform isair/jarvis into a Discord-controlled voice assistant running on
the Ubuntu VNC desktop, keeping the mature ~39k-line Python brain intact.

- bot/ (Node + bun, discord.js): /자비스 slash commands (ephemeral),
  voice channel join + voice receive/playback, pluggable VNC screen broadcast
  (selfbot live / noVNC / screenshot)
- bridge/ (Python, Flask): wraps jarvis STT + run_reply_engine + Piper TTS
  behind a thin localhost HTTP API
- .env.example, scripts/ (start_bridge/start_bot/dev), README rewrite,
  docs/language-comparison.md and docs/vnc-xfce-setup.md

Language decision: hybrid (Python brain + Node/bun Discord layer) because
Discord blocks bot video; native screen broadcast only works via a Node
selfbot library.

bot/package.json

@@ -0,0 +1,28 @@
+{
+  "name": "javis-bot",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "description": "Discord-native voice/video front-end for the Jarvis brain (bun + discord.js)",
+  "scripts": {
+    "start": "bun run src/index.ts",
+    "register": "bun run src/register-commands.ts",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@discordjs/voice": "^0.18.0",
+    "discord.js": "^14.16.3",
+    "dotenv": "^16.4.5",
+    "libsodium-wrappers": "^0.7.15",
+    "opusscript": "^0.1.1",
+    "prism-media": "^1.3.5"
+  },
+  "optionalDependencies": {
+    "@dank074/discord-video-stream": "^4.2.1",
+    "discord.js-selfbot-v13": "^3.7.1"
+  },
+  "devDependencies": {
+    "@types/node": "^22.7.0",
+    "typescript": "^5.6.3"
+  }
+}