feat: add dynamic blog content management

[Jidnyasa-P]

Description

Enhances the Blog section by replacing the static page-level content structure with a more maintainable and scalable frontend blog system.

Changes Made

• Moved blog post content into a dedicated data module
• Added reusable BlogCard component
• Added categories and tags to blog posts
• Added article search by title, excerpt, category, and tags
• Added category filtering using dropdown and category chips
• Added combined search and category filtering
• Added filtered result count
• Added empty search/filter state with reset functionality
• Added Load More functionality
• Added dedicated detailed article pages
• Added slug-based article navigation
• Added refresh-safe article URLs
• Added browser back/forward navigation support
• Preserved the existing responsive UI and theme styling

Testing

• Tested Blog page navigation
• Tested title/topic/tag search
• Tested category dropdown filtering
• Tested category chip filtering
• Tested combined search and category filters
• Tested empty state and reset functionality
• Tested Load More functionality
• Tested article detail navigation
• Tested article page refresh
• Tested browser back and forward navigation
• Tested responsive layout on mobile, tablet, and desktop
• Ran npm run build successfully

Related Issue

Closes #64

Video

Screen.Recording.2026-07-10.182647.mp4