Documentation - Blockchain security guide

Description

Build Blockchain security guide for NEAR Protocol.

**THE VIRAL LOOP:**
```
Developer searches for guide → Finds NEAR docs → Learns NEAR → Builds on NEAR
```

**Context:**
Security searches

**Target:**
Security

**Deliverables:**
1. Complete implementation of Blockchain security guide
2. Integration with NEAR ecosystem
3. Documentation and examples
4. Published to appropriate registry/platform

**Why This Matters:**
This tool helps security discover and use NEAR Protocol. By making blockchain security guide easily accessible, we create another entry point into the NEAR ecosystem.

**Success Metric:**
- Published and discoverable
- Used by target audience
- Drives traffic/users to NEAR