feat: Interactive Impact Dashboard + Testimonials Carousel + Dark Mode

[Asmi768]

Summary

Adds a polished Impact Dashboard and Testimonials Carousel to the homepage, plus a persistent Dark/Light mode toggle.

• Animated counters and progress bars (visible-on-scroll)
• Testimonial carousel with autoplay and controls
• Theme toggle persisted via localStorage
• Responsive layout and accessible controls

Why

Enhances donor/visitor confidence with clear impact numbers, improves engagement, and modernizes UI/UX without requiring backend changes.

How to test

1. Open index.html
2. Scroll to the Impact section to see counters animate
3. Interact with carousel and theme toggle

Notes

• Replace placeholder counter values with real admin-provided numbers when available.
• Add testimonial images to assets/testimonials/ for rich visuals.

##GSSOC'25 CONTRIBUTOR

[vercel]

@Asmi768 is attempting to deploy a commit to the Himanshu Singh Kyariya's projects Team on Vercel.

A member of the Team first needs to authorize it.