chore: openapi doc generator (#2644)

* chore: extract the type and comment from apis

* chore: template code

* feat: openapi

* pref: openapi generator. send into public/openapi folder

scripts/openapi/template.md

@@ -0,0 +1,40 @@
+```ts
+import type { ApiRequestProps, ApiResponseType } from '@fastgpt/service/type/next';
+import { NextAPI } from '@/service/middleware/entry';
+
+// This should be at the top of the file after the imports
+export const ApiMetadata = {
+  name: 'template example api',
+  author: 'Finley',
+  version: '0.1.0',
+}
+
+export type TemplateQuery = {
+  // The App's ID
+  appId?: string[],
+  // The App's Name
+  name: string,
+  // The App's Description
+  description: string | Something<AppDetailType>,
+};
+
+export type TemplateBody = {
+  // The App's Name
+  name: string,
+};
+
+// This is the response type for the API
+export type TemplateResponse = AppDetailType;
+
+// This is the template API for FASTGPT NextAPI
+async function handler(
+  req: ApiRequestProps<TemplateBody, TemplateQuery>,
+  res: ApiResponseType<any>,
+): Promise<TemplateResponse> {
+
+  return {}
+}
+
+export default NextAPI(handler);
+
+```