feat: add modals for managing interns, creating projects, and tasks

- Implemented AddInternsDialog for inviting and managing interns.
- Created CreateProjectDialog for launching new projects with detailed forms.
- Added CreateTaskDialog for task creation with deadline and submission type options.
- Enhanced Header component with navigation functionality.
- Updated MentorProjectCard to navigate correctly to mentor projects.
- Refactored SidebarMentor for improved navigation and mobile responsiveness.
- Adjusted Internify login logic to streamline user role navigation.
- Added CSS styles for consistent layout and design.
- Introduced mock data for interns to facilitate development and testing.

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

@@ -17,7 +17,7 @@ export default function MentorProjectCard({
 }: ProjectCardProps) {
   const navigate = useNavigate();
   const handleCardClick = () => {
-    navigate(`/admin/projects/${id}`)
+    navigate(`/mentor/projects/${id}`)
   };
 
   const handleDeleteClick = (e: React.MouseEvent<HTMLButtonElement>) => {