feat(server,web): improve performances in person page (1) (#4387)

* feat: improve performances in people page

* feat: add loadingspinner when searching

* fix: reset people on error

* fix: case insensitive

* feat: better sql query

* fix: reset people list before api request

* fix: format

mobile/openapi/test/search_api_test.dart

@@ -27,5 +27,10 @@ void main() {
       // TODO
     });
 
+    //Future<List<PersonResponseDto>> searchPerson(String name) async
+    test('test searchPerson', () async {
+      // TODO
+    });
+
   });
 }