build(deps): move client dependencies to devDependencies

Move react, react-dom, @xterm/xterm, @xterm/addon-fit, and
@xterm/addon-serialize from dependencies to devDependencies.

These packages are only used in the client-side React UI and are
bundled into static assets during the Vite build process. They are
not required at runtime by the server-side plugin code, so keeping
them in devDependencies reduces the installed package size for end
users.

No functional changes; improves package optimization.

Author: MBanucu

package.json

@@ -74,22 +74,22 @@
     "playwright-core": "1.57.0",
     "prettier": "^3.8.1",
     "typescript": "^5.3.0",
-    "vite": "^7.3.1"
+    "vite": "^7.3.1",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "@xterm/xterm": "^6.0.0",
+    "@xterm/addon-fit": "^0.11.0",
+    "@xterm/addon-serialize": "^0.14.0"
   },
   "peerDependencies": {
     "typescript": "^5"
   },
   "dependencies": {
     "@opencode-ai/plugin": "1.1.47",
     "@opencode-ai/sdk": "1.1.47",
-    "@xterm/addon-fit": "^0.11.0",
-    "@xterm/addon-serialize": "^0.14.0",
-    "@xterm/xterm": "^6.0.0",
     "bun-pty": "^0.4.8",
     "moment": "^2.30.1",
     "open": "^11.0.0",
-    "react": "^18.3.1",
-    "react-dom": "^18.3.1",
     "strip-ansi": "^7.1.2"
   }
 }