Refactor: reorganize login screen structure and remove unused components

- Updated import path for the login screen.
- Removed the AppStrings class from constants as it has been integrated into core constants.
- Deleted unused files related to the home page and login components, including progress bars, statistics cards, and tenders list items.
- Cleaned up widget imports in the login screen to streamline the codebase.

lib/views/login/widgets/login_title.dart

@@ -0,0 +1,30 @@
+import 'package:flutter/material.dart';
+
+import '../../../core/constants/strings.dart';
+import '../../../size_config.dart';
+
+class LoginTitle extends StatelessWidget {
+  const LoginTitle({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        Text(
+          AppStrings.signInTitle,
+          style: TextStyle(fontSize: 28.0.sp(), fontWeight: FontWeight.w700),
+        ),
+        SizedBox(height: 8.0.h()),
+        Text(
+          AppStrings.signInSubtitle,
+          style: TextStyle(
+            fontSize: 14.0.sp(),
+            fontWeight: FontWeight.w400,
+            color: Colors.grey,
+          ),
+          textAlign: TextAlign.center,
+        ),
+      ],
+    );
+  }
+}