Add workspace terminal panel

package.json

@@ -30,10 +30,13 @@
     "@earendil-works/pi-coding-agent": "^0.74.0",
     "@fastify/static": "^8.3.0",
     "@fastify/websocket": "^11.2.0",
+    "@xterm/addon-fit": "^0.11.0",
+    "@xterm/xterm": "^6.0.0",
     "codemirror": "^6.0.2",
     "fastify": "^5.6.1",
     "lit": "^3.3.1",
     "marked": "^18.0.3",
+    "node-pty": "^1.1.0",
     "ws": "^8.18.3"
   },
   "devDependencies": {