docs(kafka): Schema registry documentation

[johnBgood]

Description

Feature Request: support for schema registry in the Kafka connector.
It will be released with 8.6 (not backported).

Related issues:

• https://github.com/camunda/team-connectors/issues/874
• https://github.com/camunda/team-connectors/issues/646

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]

👋 🤖 🤔 Hello! Did you make your changes in all the right places?

These files were changed only in docs/. You might want to duplicate these changes in versioned_docs/version-8.5/.

• docs/components/connectors/out-of-the-box-connectors/kafka.md
• docs/self-managed/operational-guides/update-guide/850-to-860.md

You may have done this intentionally, but we wanted to point it out in case you didn't. You can read more about the versioning within our docs in our documentation guidelines.

[mesellings]

@johnBgood I will review this for you 👍

[mesellings]

@johnBgood I've committed my changes directly to the branch as follows:

• Structural, grammar, readability, standards modifications

I made quite a lot of changes to improve the page that were not connected to this PR, but felt it was worth including them to improve the page and integrate your changes better.

Happy to approve, great job 🚀 👍

[johnBgood]

@akeller I guess we can merge this, right? It's for 8.6.0.

[mesellings]

@johnBgood I don't see a reason why we can't merge this into the Next docs for the 8.6 release, unless there is something I'm perhaps not aware of?

[johnBgood]

Sorry typo...I meant "we can" :) I agree.

There's a build error though, not sure why

[mesellings]

Sorry typo...I meant "we can" :) I agree.

There's a build error though, not sure why

Great - I'll check that out and get this merged 👍

[mesellings]

@johnBgood This can be merged now (just needed to merge main in) 👍 I can also merge if you prefer?

[johnBgood]

Feel free to proceed, thank you :)

[github-actions]

🧹 Preview environment for this PR has been torn down.