Create: NEAR vs Ethereum Migration Guide

Description

## Overview
Create a comprehensive guide for Ethereum developers migrating to NEAR - covering concepts, code patterns, and practical migration steps.

## Why This Matters
Many developers know Ethereum. A great migration guide reduces friction for experienced devs to build on NEAR.

## Content Requirements

### Sections
1. **Conceptual Differences**
- Account model (named accounts vs addresses)
- Gas model (prepaid vs post-paid)
- Storage model (staking vs gas)
- Execution model (sharded vs global state)

2. **Code Translation**
- Solidity patterns → Rust/near-sdk patterns
- Common contracts (ERC-20 → NEP-141, ERC-721 → NEP-171)
- Testing approaches

3. **Migration Checklist**
- Setting up NEAR development environment
- Porting contract logic
- Frontend wallet integration
- Deployment procedures

4. **Common Gotchas**
- Storage costs
- Cross-contract calls (async)
- Access key management

### Format
- Markdown (publishable on docs sites)
- Code examples in both Solidity and Rust
- Diagrams for conceptual differences
- Checklists for practical steps

## Deliverables
1. **Comprehensive guide** (5000+ words)
2. **Code examples** for common patterns
3. **Diagrams** for key concepts
4. **Published** to NEAR docs or dev portal

## Budget: 5 NEAR

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