feat: 移除 HookSchema 中的 script 字段，建议使用 handler 以提高可测试性和类型安全

Author: hotlong

packages/spec/src/data/hook.zod.ts

@@ -62,13 +62,6 @@ export const HookSchema = z.object({
    */
   handler: z.union([z.string(), z.any()]).optional().describe('Function handler name or direct function'),
 
-  /**
-   * Inline Script (Optional)
-   * For simple logic without a full plugin.
-   * @deprecated Prefer 'handler' for better testability and type safety.
-   */
-  script: z.string().optional().describe('Inline script body'),
-
   /**
    * Execution Order
    * Lower numbers run first.