🌐 i18n: translate the README

[Cryptoteep]

🌐 Good first issue

Help developers in your language discover chroma-flow by translating the README.

How to contribute

1. Copy README.md to README.<lang>.md (e.g. README.zh-CN.md, README.es.md, README.ja.md).
2. Translate the prose. Keep code blocks and headings in English.
3. Add a language switcher link at the top of the main README.md.
4. Update CHANGELOG.md under [Unreleased].

Notes

• Machine translation is fine as a starting point — a native speaker will review.
• Comment with the language you want to take so we don't duplicate work.

Thank you for helping make accessible tooling reach more people! 🙏