Revamps design with modernized UI and improved accessibility

[sympact06]

• Updates header and homepage with new styling, utilizing Tailwind CSS for consistency and improved layout
• Refactors Footer component to a dynamic and flexible structure; enhances link data accessibility
• Refactors ProfileButton, replacing legacy styling with Tailwind CSS classes
• Removes redundant subreddit fetch; simplifies link and card component markup for cleaner code
• Optimizes hero section to fill the viewport and centralize content for better user engagement
• Adds new Tailwind styles and restructures to maintain legacy compatibility
• Introduces link to new contributor, Sympact06, in the footer

This update enhances the codebase's maintainability and delivers a cohesive visual identity across the site.