refactor: remove the unused submitUserInfo method and enhance the searchable dropdown functionality

- Removed `submitUserInfo` from auth services and integrations.
- Refined dropdown with new multi-select and searchable options.
- Added `PersianFormatter` for better input handling.
- Updated `local.properties` to set flutter build mode to debug.

packages/chicken/lib/data/data_source/remote/auth/auth_remote.dart

@@ -11,8 +11,6 @@ abstract class AuthRemoteDataSource {
 
   Future<UserInfoModel?> getUserInfo(String phoneNumber);
 
-  Future<void> submitUserInfo(Map<String, dynamic> userInfo);
-
-  /// Calls `/steward-app-login/` endpoint with optional query parameters and required token header.
+  /// Calls `/steward-app-login/` endpoint with required token and `server` as query param, plus optional extra query parameters.
   Future<void> stewardAppLogin({required String token, Map<String, dynamic>? queryParameters});
 }

packages/chicken/lib/data/data_source/remote/auth/auth_remote_imp.dart

@@ -48,15 +48,6 @@ class AuthRemoteDataSourceImp extends AuthRemoteDataSource {
     return res.data;
   }
 
-  @override
-  Future<void> submitUserInfo(Map<String, dynamic> userInfo) async {
-    await _httpClient.post(
-      '/steward-app-login/',
-      data: userInfo,
-      headers: {'Content-Type': 'application/json'},
-    );
-  }
-
   @override
   Future<void> stewardAppLogin({
     required String token,
@@ -64,7 +55,7 @@ class AuthRemoteDataSourceImp extends AuthRemoteDataSource {
   }) async {
     await _httpClient.post(
       '/steward-app-login/',
-      queryParameters: queryParameters,
+      data: queryParameters,
       headers: {'Content-Type': 'application/json', 'Authorization': 'Bearer $token'},
     );
   }