feat: onboarding page

lib/presentation/components/button/button.dart

@@ -0,0 +1,5 @@
+import 'package:flutter/material.dart';
+
+import '../../../common/theme/theme.dart';
+
+part 'elevated_button.dart';

lib/presentation/components/button/elevated_button.dart

@@ -0,0 +1,34 @@
+part of 'button.dart';
+
+class AppElevatedButton extends StatelessWidget {
+  const AppElevatedButton({
+    super.key,
+    required this.onPressed,
+    required this.title,
+    this.width = double.infinity,
+    this.height = 48.0,
+  });
+
+  final Function()? onPressed;
+  final String title;
+  final double width;
+  final double height;
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox(
+      width: width,
+      height: height,
+      child: ElevatedButton(
+        onPressed: onPressed,
+        child: Text(
+          title,
+          style: AppStyle.lg.copyWith(
+            color: AppColor.white,
+            fontWeight: FontWeight.w700,
+          ),
+        ),
+      ),
+    );
+  }
+}