Docs for Stacks in private registry

[rkoron007]

What

🎫 ticket

Adding docs for registry publishing for Stacks.

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Merge Checklist

If items do not apply to your changes, add (N/A) and mark them as complete.

Pull Request

• Description links to related pull requests or issues, if any.

Content

• Redirects have been added to content/terraform-docs-common/redirects.jsonc for moved, renamed, or deleted pages.
• [ N/A ] API documentation and the API Changelog have been updated. ---> these will happen in a separate PR
• Links to related content where appropriate (e.g., API endpoints, permissions, etc.).
• Pages with related content are updated and link to this content when appropriate.
• Sidebar navigation files have been updated for added, deleted, reordered, or renamed pages.
• New pages have metadata (page name and description) at the top.
• New images are 2048 px wide. They have HashiCorp standard annotation color (#F92672) and format (rectangle with rounded corners), blurred sensitive details (e.g. credentials, usernames, user icons), and descriptive alt text in the markdown for accessibility.
• New code blocks have the correct syntax and line breaks to eliminate horizontal scroll bars.
• UI elements (button names, page names, etc.) are bolded.
• The Vercel website preview successfully deployed.

Reviews

• I or someone else reviewed the content for technical accuracy.
• I or someone else reviewed the content for typos, punctuation, spelling, and grammar.

[github-actions]

Vercel Previews Deployed

Name	Status	Preview	Updated (UTC)
Dev Portal	✅ Ready (Inspect)	Visit Preview	Sat Dec 13 01:08:55 UTC 2025
Unified Docs API	✅ Ready (Inspect)	Visit Preview	Sat Dec 13 01:04:32 UTC 2025

[github-actions]

Broken Link Checker

No broken links found! 🎉

[robin-norwood]

lgtm! Just one question about how the semantic tag version and tag prefixes interact.

[MiniHeyd]

Everything looks good and no blocking comments from me!