feat: Add Instructor Testimonials/Success Stories Section on Homepage

[SujalTripathi]

Description

The homepage talks about empowering Indian women but shows no real
social proof. A testimonials section with instructor success stories
builds trust and encourages both learners to book and women to sign up
as instructors.

Current Behavior

• No testimonials or success stories on homepage
• No social proof for new visitors
• Homepage ends abruptly after the "Ready to begin?" section

Expected Behavior

• A "What our community says" section on the homepage
• 3 testimonial cards: mix of learner reviews and instructor stories
• Each card: quote, name, role (Learner/Instructor), location
• Visually warm and culturally on-brand

Tech Involved

• Static data array for testimonials
• Tailwind CSS card components
• Added to app/page.tsx

Acceptance Criteria

• Testimonials section added to homepage (app/page.tsx)
• Minimum 3 testimonial cards
• Each card has quote, name, role, and location
• Responsive grid layout (1 col mobile, 3 col desktop)
• Consistent orange/amber styling with site theme

Contributing on behalf of NSoC'26 | @Mehren7 please assign me

[omkartike]

i would also like to work on this issue if its possible , please assign me