chore: more dart lints (#30665)

The lints are regrouped and sorted. Also, added the following new lints:
- unnecessary_ignore
- parameter_assignments
- avoid_unused_constructor_parameters
- tighten_type_of_initializing_formals
- only_throw_errors
- deprecated_consistency
- unnecessary_statements

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/services/api.service.dart

@@ -113,12 +113,10 @@ class ApiService {
   }
 
   Future<bool> _isEndpointAvailable(String serverUrl) async {
-    if (!serverUrl.endsWith('/api')) {
-      serverUrl += '/api';
-    }
+    final endpoint = serverUrl.endsWith('/api') ? serverUrl : '$serverUrl/api';
 
     try {
-      setEndpoint(serverUrl);
+      setEndpoint(endpoint);
       await serverInfoApi.pingServer().timeout(const Duration(seconds: 5));
     } on TimeoutException catch (_) {
       return false;