feat: update Meteor Admin SDK CMS element to Vue.js 3

[Dominik Grothaus (dgrothaus-sw)]

Summary

Updates the examples and code used in the documentation to match Vue.js 3 used in Meteor for Shopware 6.7.
Added examples of how to not only add the element to the replace modal but to the block picker, too.

Changed to tone to match other documentation.

Removed the code for Shopware < 6.7 as the docs for Shopware < 6.7 are separate.

Updated the screenshots to mirror the current visuals of the administration.

Related links

Closes #1914

Checklist

• I reviewed affected links, code samples, and cross-references, including PageRef references where relevant.
• I added or updated redirects in .gitbook.yaml if pages were moved, renamed, or deleted.
• I updated .wordlist.txt (and sorted it) if spellcheck flags new legitimate terms.
• Any required dependent changes in downstream modules have already been merged and published.
• This pull request is ready for review.

Notes

[Copilot]

Pull request overview

This PR updates the documentation for adding CMS elements via the Meteor Admin SDK to match the Vue 3 (SFC) approach used with Meteor for Shopware 6.7, and improves discoverability by documenting how to register both a CMS block (block picker) and a CMS element (replacement modal).

Changes:

• Update the “Add CMS Element” Admin SDK guide to Vue 3 SFC-based examples and add registerCmsBlock usage alongside registerCmsElement.
• Clarify the relationship between declarative cms.xml blocks vs fully custom Admin SDK elements, including cross-linking between the guides.
• Extend the spellcheck wordlist with “discoverable”.

Reviewed changes

Copilot reviewed 3 out of 6 changed files in this pull request and generated 3 comments.

File	Description
guides/plugins/apps/content/cms/add-custom-cms-blocks.md	Clarifies cms.xml block limitations and links to the Admin SDK element approach.
guides/plugins/apps/administration/add-cms-element-via-admin-sdk.md	Reworks the guide to Vue 3 SFC examples, adds block+element registration guidance, and updates sample snippets.
.wordlist.txt	Adds “discoverable” to the wordlist.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 6 changed files in this pull request and generated 7 comments.

[Micha Hobert (Isengo1989)]

Dominik Grothaus (@dgrothaus-sw) did you see the comments by Copilot? Can you please check and solve those? I can not validate those from a dev POV.

Also, a PR snuck in yesterday that would need some attention (I think mostly structural). I can take over this, if you are busy.

[Dominik Grothaus (dgrothaus-sw)]

Micha Hobert (@Isengo1989) I've gone through the comments and they don't really provide value. In the first iteration, Copilot did not mention any of these issues. While writing the docs, I followed the documentation to create a new app to see if the instructions work and it works fine.

The example is working fine without the changes Copilot suggested.

Regarding the changes from the PR: I'll resolve the conflicts.