Build npm Package: near-storage-helper - Contract Storage Tools

Description

## Overview
Create an npm package for working with NEAR contract storage - reading, estimating costs, and managing storage deposits.

## Why This Matters
Storage management is crucial on NEAR. This package simplifies storage cost estimation and deposits.

## Technical Requirements
- Read contract storage
- Estimate storage costs
- Calculate deposit requirements
- Manage storage deposits
- Storage optimization tips

## Deliverables
1. npm package
2. Storage cost calculator
3. Deposit management
4. Clear documentation