Feature: Implement React/Vite Frontend UI

[milan-sahoo04]

No description provided.

[milan-sahoo04]

Hello Maintainers,

This Pull Request introduces the complete React/Vite frontend UI for the Faculty Management System, built according to the planned architecture.

Key Changes:

• Full setup of a React application using Vite.
• Implemented React Router v6 structure (AppRouter.jsx) with protected routes and a main layout.
• All required pages (Home, About, Faculty, Courses, Research, Events, Contact, Login, Dashboard, NotFound) are built with responsive Bootstrap 5 components and custom CSS for animation/theming.
• Integrated AuthContext for token-based authentication (required for the /dashboard route).
• Data fetching logic in page components uses a centralized facultyService (Axios) with dummy data fallback for initial testing.

The frontend is ready for code review and integration testing against the Spring Boot backend APIs (/api/faculty, /api/auth/login, etc.).

Please let me know if any changes are required before merging.

Thank you!