Updated and added comments

lib/core/adaptive_page_route.dart

@@ -1,7 +1,11 @@
 import 'dart:io';
+
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
+/// Returns a platform-adaptive page route based on the current platform.
+/// - On iOS, it returns a [CupertinoPageRoute].
+/// - On other platforms, it returns a [MaterialPageRoute].
 Route<T> adaptivePageRoute<T>({
   required Widget Function(BuildContext) builder,
   bool fullscreenDialog = false,

lib/core/constants.dart

@@ -1,3 +1,4 @@
+/// Application-wide constants
 class Constants {
   Constants._(); // Private constructor to prevent instantiation
 

lib/core/custom_theme.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 
+/// Theme class that defines colors, border radius, padding, and decorations
 class CustomTheme {
   CustomTheme._(); // Private constructor to prevent instantiation