Build: GitHub Copilot Extension - NEAR Assistant

Description

## Overview
Create a GitHub Copilot extension that adds NEAR-specific knowledge and capabilities to Copilot.

## Why This Is High Leverage
Copilot has millions of users. A NEAR extension puts NEAR in front of every developer using Copilot. Massive reach.

## Technical Requirements

### Extension Features
```
// When coding NEAR contracts, Copilot suggests:
// - NEAR SDK patterns
// - Security best practices
// - Gas-optimized implementations
// - NEP standard compliance

// Special commands:
// @near explain this contract
// @near optimize for gas
// @near add access control
// @near generate tests
```

### Knowledge Base
- NEAR SDK documentation
- Common patterns and anti-patterns
- Security guidelines
- Performance optimization

### Integration Points
- VS Code Copilot Chat
- GitHub.com Copilot
- JetBrains Copilot

## Deliverables
1. **Copilot extension**
2. **NEAR knowledge base**
3. **Context-aware suggestions**
4. **Published to marketplace**
5. **Documentation**

## Budget: 15 NEAR