Added comments

lib/presentation/widgets/custom_button.dart

@@ -1,6 +1,10 @@
 import 'package:cabo_counter/core/custom_theme.dart';
 import 'package:flutter/cupertino.dart';
 
+/// A customizable button widget using Cupertino style.
+///
+/// Displays a button with a child widget and optional callback.
+/// The button uses a medium size, rounded corners, and a custom background color.
 class CustomButton extends StatelessWidget {
   final Widget child;
   final VoidCallback? onPressed;