feat: add VNC support with noVNC integration

- Introduced a new VNC viewer panel in the frontend, allowing users to connect to VNC sessions.
- Implemented VNC connection handling with optional SSH tunneling in the backend.
- Added a new SSH key manager for managing SSH keys within the terminal.
- Created a trigger rules engine to monitor terminal output and trigger actions based on defined patterns.
- Added CSS styles for the VNC viewer and its components.
- Updated database schema to support VNC protocol in profiles.
- Implemented WebSocket proxy for VNC connections to facilitate communication between the frontend and backend.

frontend/package.json

@@ -5,15 +5,20 @@
   "description": "Frontend for Nexus Terminal desktop SSH client",
   "scripts": {
     "install:assets": "node scripts/copy-assets.js",
+    "bundle:novnc": "node scripts/bundle-novnc.js",
     "build": "node scripts/build.js",
     "dev": "node scripts/build.js --watch",
-    "postinstall": "npm run install:assets"
+    "postinstall": "npm run install:assets && npm run bundle:novnc"
   },
   "dependencies": {
+    "@novnc/novnc": "^1.5.0",
     "xterm": "5.3.0",
     "xterm-addon-fit": "0.8.0",
     "xterm-addon-search": "0.13.0",
     "xterm-addon-unicode11": "0.6.0",
     "xterm-addon-web-links": "0.9.0"
+  },
+  "devDependencies": {
+    "esbuild": "^0.24.0"
   }
 }