feat(notifications): add notification history page and API

This commit introduces the notification history feature, allowing users to view a log of their past notifications.

Key changes include:
- Added a "Notifications" link to the sidebar with a new icon.
- Defined API endpoints for fetching notification history and details.
- Added a "sent" status variant for displaying notification status.

Additionally, this commit includes related UI improvements:
- The user's full name is now dynamically displayed in the header, replacing the hardcoded placeholder.
- Table headers are now styled in uppercase for improved readability and consistency.

src/components/Layouts/sidebar/data/index.ts

@@ -6,7 +6,7 @@ const navSubItemSchema: z.ZodType<any> = z.lazy(() =>
     title: z.string(),
     url: z.string(),
     icon: z.any(),
-    items: z.array(navSubItemSchema).default([]),
+    items: z.array(navSubItemSchema),
   }),
 );
 
@@ -66,6 +66,12 @@ export const NAV_DATA: NavData = [
         icon: Icons.Table,
         items: [],
       },
+      {
+        title: "Notifications",
+        url: "/notification-history",
+        icon: Icons.NotificationIcon,
+        items: [],
+      },
     ],
   },
 ];