[Feature] Documentation: guides, API reference and annotated examples

[ElioNeto]

Overview

Write comprehensive documentation covering the architecture, annotation system, CLI, configuration, and real-world examples.

Acceptance Criteria

• Getting Started guide: install, scaffold, run first project
• Annotation Reference: full spec for @Route, @Validate, @Auth, @Page
• CLI Reference: all commands with flags and examples
• vyx.yaml Reference: all configuration keys documented
• Architecture Overview: how core, workers, and IPC interact
• Examples: Node.js + Zod, Python + Pydantic, React SSR page with auth
• Docs hosted via GitHub Pages or a dedicated site

References

• Spec §12 – Use Cases and Examples
• Roadmap – Phase 3