Add API to get doc info by doc ids (#1986)

Supports use API to get doc info by doc ids

### What problem does this PR solve?

feat: Supports use API to get doc info by doc ids

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

api/apps/api_app.py

@@ -571,6 +571,19 @@ def list_kb_docs():
     except Exception as e:
         return server_error_response(e)
 
+@manager.route('/document/infos', methods=['POST'])
+@validate_request("doc_ids")
+def docinfos():
+    token = request.headers.get('Authorization').split()[1]
+    objs = APIToken.query(token=token)
+    if not objs:
+        return get_json_result(
+            data=False, retmsg='Token is not valid!"', retcode=RetCode.AUTHENTICATION_ERROR)
+    req = request.json
+    doc_ids = req["doc_ids"]
+    docs = DocumentService.get_by_ids(doc_ids)
+    return get_json_result(data=list(docs.dicts()))
+
 
 @manager.route('/document', methods=['DELETE'])
 # @login_required