Add Maria WhatsApp+RAG bridge as a service (LXC 171)

Move the /tmp prototype (Baileys bridge + RAG consumer) into git as a
proper sibling project to discord-bridge/: own systemd --user units
(whatsapp bridge, rag consumer, dashboard, periodic Drive sync timer),
a filesystem document store with a stdlib control dashboard (start/
stop/restart, document CRUD, reindex, Google Drive sync via rclone),
and an idempotent ops/install.sh following the same conventions.

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

proxmox/lxc171-claude-agent/maria-whatsapp-bridge/whatsapp/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "maria-whatsapp-bridge",
+  "version": "1.0.0",
+  "description": "WhatsApp bridge for Maria RAG support bot, using Baileys",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "dependencies": {
+    "@whiskeysockets/baileys": "^6.7.16",
+    "express": "^4.21.0",
+    "pino": "^9.6.0",
+    "qrcode": "^1.5.4"
+  }
+}