feat: Update theme colors and add Today Schedule screen

- Changed color scheme from ShadBlueColorScheme to ShadZincColorScheme in main.dart
- Added getMostRecentIntake method in SupplementProvider to retrieve the latest intake for a supplement
- Integrated TodayScheduleScreen into HomeScreen with a new BottomNavigationBar item
- Updated SupplementsListScreen title and adjusted layout for better UX
- Enhanced SupplementCard to support undoing last taken action and improved popover menu options
- Added popover package for better UI interactions

lib/screens/home_screen.dart

@@ -6,6 +6,7 @@ import 'add_supplement_screen.dart';
 import 'history_screen.dart';
 import 'settings_screen.dart';
 import 'supplements_list_screen.dart';
+import 'today_schedule_screen.dart';
 
 class HomeScreen extends StatefulWidget {
   const HomeScreen({super.key});
@@ -18,6 +19,7 @@ class _HomeScreenState extends State<HomeScreen> {
   int _currentIndex = 0;
 
   final List<Widget> _screens = [
+    const TodayScheduleScreen(),
     const SupplementsListScreen(),
     const HistoryScreen(),
     const SettingsScreen(),
@@ -45,11 +47,18 @@ class _HomeScreenState extends State<HomeScreen> {
           });
         },
         type: BottomNavigationBarType.fixed,
+        selectedItemColor: Theme.of(context).colorScheme.primary,
+        unselectedItemColor: Theme.of(context).colorScheme.onSurface.withValues(alpha: 0.4),
+        backgroundColor: Theme.of(context).colorScheme.surface,
         items: const [
           BottomNavigationBarItem(
-            icon: Icon(Icons.medication),
+            icon: Icon(Icons.medication_liquid_sharp),
             label: 'Supplements',
           ),
+          BottomNavigationBarItem(
+            icon: Icon(Icons.edit_calendar_rounded),
+            label: 'Edit',
+          ),
           BottomNavigationBarItem(
             icon: Icon(Icons.history),
             label: 'History',
@@ -60,7 +69,7 @@ class _HomeScreenState extends State<HomeScreen> {
           ),
         ],
       ),
-      floatingActionButton: _currentIndex == 0
+      floatingActionButton: _currentIndex == 1
           ? FloatingActionButton(
               onPressed: () async {
                 await Navigator.of(context).push(