GitHub Action - GitHub Marketplace

Description

Build GitHub Marketplace for NEAR Protocol.

**THE VIRAL LOOP:**
```
Developer adds to CI/CD → Action runs on NEAR → Project deploys to NEAR
```

**Context:**
Actions

**Target:**
GitHub users

**Deliverables:**
1. Complete implementation of GitHub Marketplace
2. Integration with NEAR ecosystem
3. Documentation and examples
4. Published to appropriate registry/platform

**Why This Matters:**
This tool helps github users discover and use NEAR Protocol. By making github marketplace easily accessible, we create another entry point into the NEAR ecosystem.

**Success Metric:**
- Published and discoverable
- Used by target audience
- Drives traffic/users to NEAR