fisrt three screens

lib/widgets/onboarding_button.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+
+class OnboardingButton extends StatelessWidget {
+  final String text;
+  final VoidCallback? onPressed;
+
+  const OnboardingButton({super.key, required this.text, this.onPressed});
+
+  @override
+  Widget build(BuildContext context) {
+    return ElevatedButton(
+      onPressed: onPressed ?? () {},
+      style: ElevatedButton.styleFrom(
+        backgroundColor: const Color(0xFF2D2D2D),
+        foregroundColor: Colors.white,
+        padding: const EdgeInsets.symmetric(horizontal: 80, vertical: 10),
+        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(14)),
+        elevation: 0,
+      ),
+      child: Text(
+        text,
+        style: const TextStyle(
+          fontFamily: 'AbdElRady',
+          color: Colors.white,
+          fontSize: 20,
+          fontWeight: FontWeight.w700,
+        ),
+      ),
+    );
+  }
+}