fix(editor): 用 pnpm overrides 钉住 @codemirror/state 单一版本

新增 @codemirror/commands 依赖拉进了第二个 @codemirror/state(6.7.0 vs 6.6.0)，
双实例破坏 Extension 的 instanceof 检查导致运行时报错；overrides 统一到 6.7.0。

Author: qianmoQ

package.json

@@ -78,7 +78,8 @@
   },
   "pnpm": {
     "overrides": {
-      "@codemirror/autocomplete": "6.20.3"
+      "@codemirror/autocomplete": "6.20.3",
+      "@codemirror/state": "6.7.0"
     }
   }
 }