Rewards page scaffold

[masvelio]

Link to Issue

Closes: #10325

Description of Changes

1. New Rewards Page Feature

• Created a new /rewards route accessible in both common and custom domains
• Implemented a new rewards page with three main sections:
  • Referrals
  • Wallet Balance
  • Quests

2. UI Components

• Added new components:
  • RewardsCard - A reusable card component for the rewards page
  • RewardsTab - Mobile tab navigation component
  • Table components for each section (Referral, Quest, Wallet)

3. Navigation Updates

• Added rewards button to desktop header with ETH balance display
• Added rewards tab to mobile navigation when feature is enabled
• Updated "My transactions" link to redirect to rewards page when enabled

4. Feature Flag Integration

• Added FLAG_REWARDS_PAGE environment variable
• Integrated feature flag checks throughout the application

Test Plan

• FLAG_REWARDS_PAGE to true
• check /rewards page
• only UI for now

Deployment Plan

1. n/a

Other Considerations

• n/a