External dataset (#1519)

* perf: local file create collection

* rename middleware

* perf: remove code

* feat: next14

* feat: external file dataset

* collection tags field

* external file dataset doc

* fix: ts

projects/app/src/service/middleware/entry.ts

@@ -0,0 +1,6 @@
+import { connectToDatabase } from '../mongo';
+import { NextEntry } from '@fastgpt/service/common/middle/entry';
+
+export const NextAPI = NextEntry({
+  beforeCallback: [connectToDatabase()]
+});