feat: implement social login functionality with Google, Facebook, and Twitter, including API integration and platform-specific configurations.

lib/core/constants/api_constants.dart

@@ -39,4 +39,7 @@ class ApiConstants {
   // 2FA
   static const String twoFactorVerify = '/auth/2fa/verify';
   static const String twoFactorVerifyBackup = '/auth/2fa/verify-backup';
+
+  // Social Auth
+  static const String authSocial = '/auth/social';
 }