fix(free-demo): update package.json

Author: louisyoungx

apps/demo-free-layout/package.json

@@ -32,6 +32,8 @@
     "@douyinfe/semi-ui": "^2.72.3",
     "@flowgram.ai/free-layout-editor": "workspace:*",
     "@flowgram.ai/free-snap-plugin": "workspace:*",
+    "@flowgram.ai/free-lines-plugin": "workspace:*",
+    "@flowgram.ai/free-node-panel-plugin": "workspace:*",
     "@flowgram.ai/minimap-plugin": "workspace:*",
     "lodash-es": "^4.17.21",
     "nanoid": "^4.0.2",
@@ -58,4 +60,4 @@
     "access": "public",
     "registry": "https://registry.npmjs.org/"
   }
-}
+}