docs(unified): Create unified documentation hub with search

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Issue from Trinity Improvement Plan (Part 2, Priority 2)

Context

Documentation is scattered across 100+ markdown files with no single entry point.

Task Description

Create a unified documentation hub with search, navigation, and version selector.

Requirements

1. Single Entry Point:

   • Landing page for all documentation
   • Clear navigation hierarchy
   • Search functionality

2. Organization:

   • Merge research/ + website/ + API/ into coherent structure
   • Add: Search, navigation, version selector
   • Cross-references between sections

3. Features:

   • Full-text search across all docs
   • Navigation tree/table of contents
   • Version selector for different components
   • Responsive design

4. Implementation Options:

   • Extend existing Docusaurus setup
   • Use Hugo/Jekyll static site generator
   • Custom Zig-based solution

Deliverables

1. Unified documentation hub deployed
2. Search functionality working
3. Navigation structure defined
4. Migration guide for existing docs

Timeline

• Week 1: Design and structure
• Week 2: Implementation
• Week 3: Testing and deployment

Success Criteria

• Single URL serves all documentation
• Search returns relevant results
• Navigation covers all major topics
• Mobile-friendly

Labels

priority: medium, documentation, ux
type: feature
component: docs, website

[gHashTag]

Unified documentation hub exists: docs/README.md with links to research/, tri27/, papers/, sacred-math/.