VS Code Extension - NEAR Rust Snippets

Description

Build a VS Code extension for NEAR Rust Snippets.

**THE VIRAL LOOP:**
Developer installs extension → Better NEAR dev experience → Builds on NEAR

**Deliverables:**
1. VS Code extension
2. Comprehensive snippets/support
3. Documentation
4. Published to VS Code Marketplace

**Success Metric:** 100+ installs