Build VS Code Extension: NEAR Transaction Viewer

Description

## Overview
Create a VS Code extension that displays NEAR transaction details inline - click a tx hash in code to see full details.

## Why This Matters
Developers constantly look up transactions. Inline viewing saves context switching to block explorers.

## Technical Requirements
- Detect tx hashes in code
- Show hover with details
- Click to open full view
- Link to explorer
- Support testnet and mainnet

## Deliverables
1. VS Code extension published
2. Inline transaction details
3. Quick explorer links
4. Documentation