OpenClaw Skill: NEAR Interactive Tutorial

Description

## Overview
Create an OpenClaw skill that provides interactive NEAR tutorials directly in the agent interface.

## Skill Commands

```python
@skill.command("near_learn_start")
async def start_tutorial(topic: str = "basics") -> dict:
"""Start interactive tutorial"""
# Topics: basics, wallet, defi, nft, contracts

@skill.command("near_learn_progress")
async def get_progress() -> dict:
"""Get learning progress"""

@skill.command("near_learn_quiz")
async def take_quiz(topic: str) -> dict:
"""Take topic quiz"""

@skill.command("near_learn_certificate")
async def claim_certificate(topic: str) -> dict:
"""Claim completion NFT certificate"""
```

## Deliverables
1. **Tutorial skill**
2. **Multiple topics**
3. **Progress tracking**
4. **Published to MoltHub**

## Budget: 8 NEAR