docs: add stackblitz how-to documentation

[rise-erpelding]

Description

Adds a new contributor guide for maintaining StackBlitz examples used by the Spectrum Web Components library.

• New doc: CONTRIBUTOR-DOCS/01_contributor-guides/10_using-stackblitz.md
  • StackBlitz terminology (project, collection, workspace)
  • Access: how to get SWC-Team workspace access
  • Adding new projects and adding existing projects to the Spectrum Web Components collection (including fork-to-workspace steps)
  • Naming conventions (swc-component-name pattern)
  • Replacing an existing project in the collection
• Contributor docs navigation updated via update-nav.js so the new guide appears under Contributor guides (breadcrumbs and “Beneath this doc” TOC).

Motivation and context

Provides the team with a single reference for updating StackBlitz examples, managing the shared collection, and onboarding others (who to ask for access, where to fork, how to add to the collection). Keeps process and naming consistent.

Related issue(s)

• SWC-1354

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Author's checklist

• I have read the CONTRIBUTING and PULL_REQUESTS documents.
• I have reviewed the Accessibility Practices for this feature, see: Aria Practices
• I have added automated tests to cover my changes.
• I have included a well-written changeset if my change needs to be published.
• I have included updated documentation if my change required it.

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Reviewer's checklist

• Includes a Github Issue with appropriate flag or Jira ticket number without a link
• Includes thoughtfully written changeset if changes suggested include patch, minor, or major features
• Automated tests cover all use cases and follow best practices for writing
• Validated on all supported browsers
• All VRTs are approved before the author can update Golden Hash

Manual review test cases

• New guide is discoverable from CONTRIBUTOR-DOCS root and nav renders

  1. Open CONTRIBUTOR-DOCS/README.md and confirm “Maintaining StackBlitz examples for Spectrum Web Components” appears under “Beneath this doc” (nested under Contributor guides).
  2. Open CONTRIBUTOR-DOCS/01_contributor-guides/README.md and confirm the same guide appears under “Beneath this doc.”
  3. Open CONTRIBUTOR-DOCS/01_contributor-guides/10_using-stackblitz.md and confirm breadcrumbs and “In this doc” TOC render correctly.
  4. Expect: The doc is findable from the root contributor docs index and has correct generated navigation.

• Doc is clear, valuable, and helpful to a human who needs it

  1. Read through CONTRIBUTOR-DOCS/01_contributor-guides/10_using-stackblitz.md in full as if you need to update a StackBlitz example or get access.
  2. Confirm the terminology, access steps, fork/add-to-collection steps, and naming conventions are understandable and actionable without prior context.
  3. Expect: A teammate could follow this guide to get access, add or replace a project in the collection, and name it correctly.

Device review

• Did it pass in Desktop?
• Did it pass in (emulated) Mobile?
• Did it pass in (emulated) iPad?

[changeset-bot]

⚠️ No Changeset found

Latest commit: d7ab69b

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

📚 Branch Preview Links

• Documentation Site (first-gen)
• Storybook (first-gen)
• Storybook (second-gen)

🔍 First Generation Visual Regression Test Results

When a visual regression test fails (or has previously failed while working on this branch), its results can be found in the following URLs:

• Spectrum | Light | Medium | LTR
• Spectrum | Dark | Large | RTL
• Express | Light | Medium | LTR
• Express | Dark | Large | RTL
• Spectrum-two | Light | Medium | LTR
• Spectrum-two | Dark | Large | RTL
• High Contrast Mode | Medium | LTR

Deployed to Azure Blob Storage: pr-6016

If the changes are expected, update the current_golden_images_cache hash in the circleci config to accept the new images. Instructions are included in that file.
If the changes are unexpected, you can investigate the cause of the differences and update the code accordingly.

[cdransf]

This looks awesome! ✨