feat: implement manual light/dark theme switcher system

Summary

This merge request integrates the latest CropNest frontend enhancements into the development branch.

Changes Included

• Redesigned Home Page UI/UX
• Added cinematic and modern landing page improvements
• Improved responsiveness across devices
• Enhanced Nearby Markets experience
• Added district/city-based market discovery flow
• Implemented interactive map improvements
• Added Telugu language support planning and UI updates
• Improved navigation and overall user experience

Testing

• Verified page navigation
• Tested responsive layouts
• Checked map rendering and market selection flow
• Validated UI consistency across pages

Impact

These changes improve the overall CropNest user experience, visual appeal, accessibility, and hackathon readiness.

Screenshots