feat(farcaster): frames v2 spike implementation

[devin-ai-integration]

Link to Issue
Closes: #10562

Description of Changes
This PR implements a spike/research for Farcaster Frames v2 integration. Key findings:

1. Technical Feasibility

• Successfully demonstrated ability to inject existing app into v2 frame
• Implemented v2-compliant frame meta tags and structure
• Created routing and component architecture for v2 frames

2. Implementation Details

• Updated frame version to "vNext" per v2 spec
• Added proper button array support
• Implemented postUrl for frame interactions
• Added Frame SDK integration

3. Blockers & Challenges

• Authentication required for frame validator testing
• Major architectural shift from server-side (v1) to client-side (v2)
• Need to maintain both v1 and v2 implementations during transition
• Careful consideration needed for wallet integration

4. What Can Be Done

• Implement v2 frames alongside existing v1
• Reuse existing contest components with minimal modification
• Leverage Frame SDK for enhanced interactivity
• Add new features like price charts and token swaps

5. Implementation Difficulties

• Complex state management between app and frame
• Authentication flow integration
• Maintaining backward compatibility
• Testing infrastructure updates needed

Test Plan

• Frame implementation can be tested at: https://farcaster-frame-spike-tunnel-ojuvirf6.devinapps.com/frame
• Manual validation using Warpcast frame validator
• No automated tests as per spike requirements

Deployment Plan
N/A - Spike/research only

Other Considerations

• Consider gradual migration strategy from v1 to v2
• Need to establish testing infrastructure for v2 frames
• Consider impact on existing frame implementations

[devin-ai-integration]

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