docs: Document editing module short description from the UI

[promptless]

Open this suggestion in Promptless to view citations and reasoning process

Adds documentation for the new feature that allows module maintainers to edit their module's short description directly from the registry page in the Viam app. The short description appears in registry search results and can now be edited via the UI in addition to updating the meta.json file.

[promptless]

Added documentation for the new "Edit short description" feature based on PR #11538, which introduces a UI modal for editing the module's short description shown in registry search results. The PR adds edit-description-modal.svelte component and backend support in registry_item.go.

Source: https://github.com/viamrobotics/app/pull/11538

[netlify]

✅ Deploy Preview for viam-docs ready!

Name	Link
🔨 Latest commit	fae2ae5
🔍 Latest deploy log	https://app.netlify.com/projects/viam-docs/deploys/69cc4e53bf8dc000082e38d7
😎 Deploy Preview	https://deploy-preview-4871--viam-docs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 43 (🟢 up 4 from production) Accessibility: 100 (no change from production) Best Practices: 100 (no change from production) SEO: 92 (no change from production) PWA: 70 (no change from production) View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[viambot]

👋 Thanks for contributing! A reviewer will look at it on the next working day!

[promptless]

Just a reminder: If you'd like me to act on any feedback you have via Github comments, just type @Promptless in your suggestion and I'll get right on it! (I won't show up in the user dropdown, but I'll process any request that has @Promptless in the comment body.)