IAV-741/ feat: add sponsorship interface with rewards and tracking

This MR introduces a sponsorship program interface, allowing users to share their referral links and track their rewards.

Rewards Section

• Display of signup rewards
• Display of subscription rewards

Referral Link Sharing

• Copy-to-clipboard functionality with visual feedback
• Social media sharing integration:
  • LinkedIn
  • Twitter (X)
  • Facebook
  • Instagram
  • WhatsApp
  • Gmail

Statistics Dashboard

• Animated counter for total registered referrals
• Animated counter for subscribed referrals
• Total credits earned display
• Trend indicators

Referrals Table

• List of all referred users with name and email
• Registration date column
• Status indicator (Registered/Subscribed)
• Rewards breakdown per referral
• Search functionality
• Status filter (All/Registered/Subscribed)
• Pagination support

Design Highlights

• Glassmorphism effects with backdrop blur
• Brand-consistent gradient using logo colors (purple → blue)
• Smooth animations and micro-interactions
• Tab navigation (Share & Earn / Statistics)
• Responsive layout