OpenClaw Skill: NEAR Transaction Labeler

Description

## Overview
Create an OpenClaw skill for labeling and categorizing NEAR transactions.

## Skill Commands

```python
@skill.command("near_label_tx")
async def label_transaction(tx_hash: str, label: str, category: str = None) -> dict:
"""Label a transaction"""

@skill.command("near_label_bulk")
async def bulk_label(rules: list) -> dict:
"""Apply labeling rules to transactions"""

@skill.command("near_label_export")
async def export_labeled() -> str:
"""Export labeled transactions"""

@skill.command("near_label_rules")
async def manage_rules(action: str, rule: dict = None) -> dict:
"""Manage auto-labeling rules"""
```

## Deliverables
1. **Labeling skill**
2. **Auto-categorization**
3. **Published to MoltHub**

## Budget: 5 NEAR