feat: Implement major features and fix theming bug

This commit introduces several new features and a critical bug fix.

- Implemented a full "Quick Pay" flow for both within and outside the bank, including IFSC validation, beneficiary verification, and a TPIN-based payment process.
- Added a date range filter to the Account Statement screen and streamlined the UI by removing the amount filters.
- Fixed a major bug that prevented dynamic theme changes from being applied. The app now correctly switches between color themes.
- Refactored and improved beneficiary management, transaction models, and the fund transfer flow to support NEFT/RTGS.

lib/l10n/app_localizations_en.dart

@@ -1,3 +1,5 @@
+// ignore: unused_import
+import 'package:intl/intl.dart' as intl;
 import 'app_localizations.dart';
 
 // ignore_for_file: type=lint
@@ -486,7 +488,8 @@ class AppLocalizationsEn extends AppLocalizations {
   String get otpVerification => 'OTP Verification';
 
   @override
-  String get otpSentMessage => 'Enter the 4-digit OTP sent to your mobile number';
+  String get otpSentMessage =>
+      'Enter the 4-digit OTP sent to your mobile number';
 
   @override
   String get verifyOtp => 'Verify OTP';
@@ -504,13 +507,15 @@ class AppLocalizationsEn extends AppLocalizations {
   String get tpinRequired => 'TPIN Required';
 
   @override
-  String get tpinRequiredMessage => 'You need to set your TPIN to continue with secure transactions';
+  String get tpinRequiredMessage =>
+      'You need to set your TPIN to continue with secure transactions';
 
   @override
   String get setTpinTitle => 'Set TPIN';
 
   @override
-  String get tpinInfo => 'Your TPIN is a 6-digit code used to authorize transactions. Keep it safe and do not share it with anyone.';
+  String get tpinInfo =>
+      'Your TPIN is a 6-digit code used to authorize transactions. Keep it safe and do not share it with anyone.';
 
   @override
   String get tpinFailed => 'Failed to set TPIN. Please try again.';
@@ -564,7 +569,8 @@ class AppLocalizationsEn extends AppLocalizations {
   String get enableFingerprintLogin => 'Enable Fingerprint Login?';
 
   @override
-  String get enableFingerprintMessage => 'Would you like to enable fingerprint authentication for faster login?';
+  String get enableFingerprintMessage =>
+      'Would you like to enable fingerprint authentication for faster login?';
 
   @override
   String get no => 'No';
@@ -585,7 +591,8 @@ class AppLocalizationsEn extends AppLocalizations {
   String get loading => 'Loading......';
 
   @override
-  String get enableFingerprintQuick => 'Enable fingerprint authentication for quick login?';
+  String get enableFingerprintQuick =>
+      'Enable fingerprint authentication for quick login?';
 
   @override
   String get kccb => 'KCCB';