feat: Refactor mentor components and implement project management features

- Removed unused imports and interfaces in HomeProjectList component.
- Added ArrowDownNarrowWide icon to ProjectTimeline component for visual enhancement.
- Updated layout imports to reflect new component structure.
- Created BaseProjectsPage for mentor to manage projects with navigation.
- Introduced MentorCertificatePage as a placeholder for future certificate functionality.
- Deleted obsolete HomeMentorPage and replaced it with HomePage for mentor dashboard.
- Added InternsPage and updated MentorInternPage for better intern management.
- Implemented ProjectForumTab and ProjectsInternTab for project details and intern listings.
- Developed TaskTab for task management within projects.
- Created SidebarMentor for navigation in mentor dashboard.
- Enhanced login functionality with user role-based navigation.
- Updated mockData to include task submission counts and certificate data structure.
- Added new assets for certificate representation.

src/Pages/internify/mentor/components/Header.tsx

@@ -0,0 +1,25 @@
+import { Bell } from "lucide-react"
+import humiclogo from "../../../../assets/logo.png";
+
+const Header = () => {
+  return (
+    <header className='sticky top-0 flex w-full justify-between items-center py-4 px-12 bg-white shadow-md z-10'>
+      <div className=''>
+        <img
+          src={humiclogo}
+          alt="Humic Logo"
+          className="w-[130px] cursor-pointer"
+        />
+      </div>
+
+      <div className="flex flex-row gap-4 items-center">
+        <Bell className="w-6 h-6 hover:text-red-800"/>
+        <div className="bg-blue-500 rounded-full w-8 h-8">
+
+        </div>
+      </div>
+    </header>
+  )
+}
+
+export default Header