feat: add Supabase integration to Flutter and update dependencies

lib/main.dart

@@ -1,7 +1,16 @@
 import 'package:flutter/material.dart';
+import 'package:supabase_flutter/supabase_flutter.dart';
+import 'core/config/supabase_config.dart';
 
-void main() {
-  runApp(const MyApp());
+void main() async {  // ← Cambia a async
+  WidgetsFlutterBinding.ensureInitialized();  // ← NUEVA
+
+  await Supabase.initialize(  // ← NUEVA (3 líneas)
+    url: SUPABASE_URL,
+    anonKey: SUPABASE_ANON_KEY,
+  );
+
+  runApp(const MyApp());  // ← Esta sí estaba
 }
 
 class MyApp extends StatelessWidget {