feat(inspector): replace xterm.js with ghostty-web

- Replace @xterm/xterm, @xterm/addon-fit, and @xterm/addon-web-links with ghostty-web
- Update Terminal component to use ghostty-web API:
  - Add async WASM initialization via init()
  - Use FitAddon with observeResize() for auto-fitting
  - Use onResize callback for terminal resize events
- ghostty-web is API-compatible with xterm.js but uses Ghostty's WASM-compiled VT100 parser
- Benefits:
  - Better rendering of complex scripts (Devanagari, Arabic)
  - XTPUSHSGR/XTPOPSGR support
  - Same battle-tested code as native Ghostty app

Ref: https://github.com/coder/ghostty-web

frontend/packages/inspector/package.json

@@ -22,8 +22,6 @@
     "lucide-react": "^0.469.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
-    "@xterm/xterm": "^5.5.0",
-    "@xterm/addon-fit": "^0.10.0",
-    "@xterm/addon-web-links": "^0.11.0"
+    "ghostty-web": "^0.3.0"
   }
 }