Cms/workspace extensions

[hifi-phil]

📋 Description

Fixes #7269

This PR has been generated by AI using Claude Code. First the example in the main UMbraco source was updated with new features, then off the back of this new docs were added and existing ones were improve to match the code base.

I would like to community team to review this and critique the submission. Tell me if its too much, not enough and what constitutes a good article, in addition to the ones already in the guide. This will further allow me to tweak the prompts to make better output.

✅ Contributor Checklist

I've followed the Umbraco Documentation Style Guide and can confirm that:

• Code blocks are correctly formatted.
• Sentences are short and clear (preferably under 25 words).
• Passive voice and first-person language (“we”, “I”) are avoided.
• Relevant pages are linked.
• All links work and point to the correct resources.
• Screenshots or diagrams are included if useful.
• Any code examples or instructions have been tested.
• Typos, broken links, and broken images are fixed.

Product & Version (if relevant)

v16

Deadline (if relevant)

📚 Helpful Resources

• 🧾 Umbraco Contribution Guidelines
• ✍️ Umbraco Documentation Style Guide

[sofietoft]

Hi @hifi-phil

Thanks for the PR.
Please add the new articles to the SUMMARY.md file found in 16/umbraco-cms.
If not added to that file, the articles will not show up in the published docs, and it is also not possible to review the content on the GitBook platform 🙏