fix(mobile): omit null values from json requests (#1212)

* chore: initial template

* feat: exlude null values

* chore: regenerate openapi

* chore: merge

* feat: store changes in a patch file

* feat: extract to sh script

* chore: regenerate openapi

* chore: remove duplicate file

* feat: generate mobile by itself

* Fixed number property not decorated correctly

* Revert hotfix, fix test

* Merge main

Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

mobile/openapi/test/api_key_response_dto_test.dart

@@ -16,7 +16,7 @@ void main() {
   // final instance = APIKeyResponseDto();
 
   group('test APIKeyResponseDto', () {
-    // num id
+    // int id
     test('to test the property `id`', () async {
       // TODO
     });