Tabs feature misses last steps on how to use with Antora

[Adito5393]

Thanks for sharing this awesome UI. The tabs feature is very nice, but it took me too long to figure out how to use it. That last bit that is missing from the README.md, something among the lines:

• add the config to the antora playbook yml:

asciidoc:
  extensions:
  - '@asciidoctor/tabs'
# Optional attributes that can be config
  attributes:
    tabs: tabs
    tabs-sync-option: ''

• make sure the package.json contains the dependency:

{
  "dependencies": {
    "@asciidoctor/tabs": "^1.0.0-beta.6"
  }
}

Would you like me to open a PR with the info?
However, if you find it redundant info, feel free to close the issue, no hard feelings :)

[osfameron]

Thanks @Adito5393, glad you're finding the UI useful 😄

I should mention that we were quite an early adopter of Antora, so the site contains some early versions of functionality that was later factored out into Antora extensions.
So it's worth checking, for example on the Antora Zulip chat if our examples are still a good way to do things!
The "tabs" feature was one of these in fact - but we did since migrate to the published extension, so I think the usage in our site (but not the README) is worth copying.

I've updated the README.adoc to link to the extension, specifically the page with docs on using with Antora. Thanks for the suggestion!

I haven't folded in the additional details you suggested, as they are covered on the extension docs. Our README could do with some care and attention, but I think it requires some thought from our side first on its purpose and intended audience.

[Adito5393]

Thanks for the link to the extension docs! It was indeed what I was missing 😄