Add notification settings page

This commit adds a new page for configuring notification settings.

src/pages/Settings.tsx

@@ -77,6 +77,7 @@ const Settings = () => {
             icon={Bell} 
             label="알림 설정" 
             description="앱 알림 및 리마인더"
+            onClick={() => navigate('/notification-settings')}
           />
         </div>