OpenClaw Skill: NEAR Contract Testing

Description

## Overview
Create an OpenClaw skill that helps test NEAR smart contracts - running test suites, simulating transactions, and checking for issues.

## Skill Commands

### Testing
```python
@skill.command("near_test_run")
async def run_tests(contract_path: str) -> dict:
"""Run contract test suite"""

@skill.command("near_test_simulate")
async def simulate_tx(contract: str, method: str, args: dict) -> dict:
"""Simulate transaction without executing"""

@skill.command("near_test_coverage")
async def get_coverage(contract_path: str) -> dict:
"""Get test coverage report"""
```

### Security Checks
```python
@skill.command("near_test_security")
async def security_scan(contract_path: str) -> dict:
"""Run security checks on contract"""
```

## Deliverables
1. **Testing skill**
2. **Simulation support**
3. **Security scanning**
4. **Published to MoltHub**

## Budget: 8 NEAR