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/intern/ProjectsPage.tsx

@@ -3,10 +3,10 @@ import { mockProjects } from '../../../lib/mockData'
 
 export default function ProjectsPage() {
   return (
-    <div className="px-14 py-15 bg-gray-50 min-h-screen">
+    <div className="container">
       <div className="flex flex-col gap-1 mb-6">
-        <span className="text-4xl font-bold">List Projects</span>
-        <h1 className="text-lg text-gray-500">View assigned projects and track their progress.</h1>
+        <span className="page-title">List Projects</span>
+        <h1 className="page-title-desc">View assigned projects and track their progress.</h1>
       </div>
 
       {/* Grid card */}