Add comprehensive documentation website

[0xgetz]

Create a dedicated documentation website for NexusForge using VitePress or Docusaurus.

Objectives

• Provide comprehensive API documentation for all packages
• Include getting started guides and tutorials
• Add example code snippets and use cases
• Enable easy navigation and search

Technical Considerations

• VitePress: Lightweight, fast, Vue-based
• Docusaurus: Feature-rich, React-based, better for complex docs

Acceptance Criteria

• Documentation site is deployed and accessible
• All packages have dedicated documentation pages
• Search functionality is working
• Mobile-responsive design