Test adding option to hide docusaurus tabs

[conceptualshark]

Description

Add the new hidden tabs CSS class, and update the existing incident variables page to use it!

When should this change go live?

• This is a bug fix, security concern, or something that needs urgent release support.
• This is already available but undocumented and should be released within a week.
• This on a specific schedule and the assignee will coordinate a release with the DevEx team. (apply hold label or convert to draft PR)
• This is part of a scheduled alpha or minor. (apply alpha or minor label)
• There is no urgency with this change and can be released at any time.

PR Checklist

• My changes are for an already released minor and are in /versioned_docs directory.
• My changes are for the next minor and are in /docs directory (aka /next/).

• My changes require an Engineering review, and I've assigned the Engineering DRI or delegate.
• My changes require a technical writer review, and I've assigned @camunda/tech-writers as a reviewer.

[github-actions]

👋 🤖 ✅ Looks like the changes were ported across versions, nice job! 🎉

You can read more about the versioning within our docs in our documentation guidelines.

[akeller]

Thanks for bringing this to the team meeting! 🚀

[conceptualshark]

@camunda/tech-writers @pepopowitz This should be good to go. In the example page, I left the final tab option unhidden, because I think it's far enough removed from the initial tabs selection that the reminder is helpful.

[akeller]

YESSSS!

I love this. Non-blocking (but please create an issue to follow up), we should add guidance on how/when to hid or not hide tabs. Somewhere in https://github.com/camunda/camunda-docs/tree/main/howtos (maybe markdown & mdx?).

[github-actions]

🧹 Preview environment for this PR has been torn down.