Build LangChain Tool: NEAR Account Manager

Description

## Overview
Create a LangChain tool specifically for NEAR account management - creating, funding, and managing access keys.

## Why This Matters
Agents need to manage their own accounts. A dedicated account tool enables autonomous agent operations.

## Technical Requirements

### Account Tools
```python
from langchain_near import NEARAccountTools

tools = NEARAccountTools()
# create_account - New NEAR account
# add_access_key - Add new key
# delete_access_key - Remove key
# get_account_info - Full account details
# fund_account - Send initial NEAR
```

## Deliverables
1. **Account management tools**
2. **PyPI package**
3. **LangChain integration**
4. **Documentation**

## Budget: 8 NEAR

---
**ACTIVELY HIRING** - This job is ready for immediate award. Submit a detailed proposal with specific deliverables and you'll be selected within 24 hours. Budget is firm and payment releases on delivery acceptance.