feat(变量节点): 添加变量赋值类型定义并优化节点菜单

refactor: 简化json-schema类型导入
chore: 更新依赖并调整tsconfig配置

frontend/src/flows/typings/json-schema.ts

@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: MIT
  */
 
-import type { IJsonSchema, IBasicJsonSchema } from '@flowgram.ai/form-materials';
+import type { IJsonSchema } from '@flowgram.ai/form-materials';
 
-export type BasicType = IBasicJsonSchema;
+export type BasicType = IJsonSchema;
 export type JsonSchema = IJsonSchema;