Add Beneficiary Animations and Localizations

lib/features/beneficiaries/screens/beneficiary_result_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 import 'package:confetti/confetti.dart';
 import 'dart:math';
+import '../../../l10n/app_localizations.dart';
 
 class BeneficiaryResultPage extends StatefulWidget {
   final bool isSuccess;
@@ -53,8 +54,8 @@ class _BeneficiaryResultPageState extends State<BeneficiaryResultPage> {
               const SizedBox(height: 20),
               Text(
                 widget.isSuccess
-                    ? 'Beneficiary Added Successfully!'
-                    : 'Beneficiary Addition Failed!',
+                    ? AppLocalizations.of(context).beneficiaryAddedSuccess
+                    : AppLocalizations.of(context).beneficiaryAdditionFailed,
                 style: TextStyle(
                   fontSize: 20,
                   fontWeight: FontWeight.bold,