Epic: Document how to document in noir/docs/README.md

[Savio-Sou]

Problem

Our docs README hasn't been updated for a while.

During the period, we've introduced a number of scripts and tooling that improve our docs. Documenting how to utilize the features in the README would be great.

Happy Case

Tasks

Preview Give feedback

1. Document how to make retroactive changes to already versioned docs
2. Document how to use chore(docs): autogeneration of NoirJS docs #3349
3. Document how to use chore(docs): codegen reference docs for nargo CLI #4149
4. Document how is https://github.com/noir-lang/noir/actions/workflows/publish-docs.yml triggered and used

Feel free to convert the above into Issues.

Project Impact

Nice-to-have

Impact Context

Great for easing docs contributions.

Workaround

None

Workaround Description

No response

Additional Context

No response

Would you like to submit a PR for this Issue?

None

Support Needs

No response