add registration password page

lib/features/auth/registration/viewmodel/registration_viewmodel.dart

@@ -0,0 +1,19 @@
+import 'package:flutter/material.dart';
+
+class RegistrationViewModel extends ChangeNotifier {
+  TextEditingController passwordCtrl = TextEditingController();
+  TextEditingController confirmPasswordCtrl = TextEditingController();
+  var formKey = GlobalKey<FormState>();
+  bool showPassword = false;
+  bool showPasswordConfirm = false;
+
+  void toggleVisibility() {
+    showPassword = !showPassword;
+    notifyListeners();
+  }
+
+  void toggleVisibilityConfirm() {
+    showPasswordConfirm = !showPasswordConfirm;
+    notifyListeners();
+  }
+}