[spaghettifunk]

Summary

• Add a plain-Markdown documentation set under docs/
• Document getting started, user workflows, feature status, reference material, and contributor architecture notes
• Update README.md to point to the new documentation landing page

Validation

• zig build
• zig build test
• zig build perf
• Checked local Markdown .md links

Notes

• Feature docs mark partial or uncertain areas conservatively with Partial / TODO
• No documentation tooling, website, or production code changes were added