Feat/Trickle ice (#336)

* feat(cloud): Use Websocket signaling in cloud mode

* refactor: Enhance WebRTC signaling and connection handling

* refactor: Improve WebRTC connection management and logging in KvmIdRoute

* refactor: Update PeerConnectionDisconnectedOverlay to use Card component for better UI structure

* refactor: Standardize metric naming and improve websocket logging

* refactor: Rename WebRTC signaling functions and update deployment script for debug version

* fix: Handle error when writing new ICE candidate to WebRTC signaling channel

* refactor: Rename signaling handler function for clarity

* refactor: Remove old http local http endpoint

* refactor: Improve metric help text and standardize comparison operator in KvmIdRoute

* chore(websocket): use MetricVec instead of Metric to store metrics

* fix conflicts

* fix: use wss when the page is served over https

* feat: Add app version header and update WebRTC signaling endpoint

* fix: Handle error when writing device metadata to WebRTC signaling channel

---------

Co-authored-by: Siyuan Miao <i@xswan.net>

ui/package.json

@@ -40,6 +40,7 @@
     "react-icons": "^5.4.0",
     "react-router-dom": "^6.22.3",
     "react-simple-keyboard": "^3.7.112",
+    "react-use-websocket": "^4.13.0",
     "react-xtermjs": "^1.0.9",
     "recharts": "^2.15.0",
     "tailwind-merge": "^2.5.5",