docs: MVP-α consumer landing page + quickstart

[caseyisonit]

Summary

Adds the first consumer-facing docs path for 2nd-gen Spectrum Web Components. Lands a Get started landing page authored in Markdown under CONTRIBUTOR-DOCS/for-consumers/get-started.md and wires it into the Storybook sidebar as the first entry. This also seeds the consumer-quickstart template used by subsequent consumer guides.

Stack position: 1 of 7 — base for this PR is main.

Part of the docs-overhaul-v2 rollout. See RFC: CONTRIBUTOR-DOCS/rfcs/proposed/2026-04-22-docs-overhaul-v2.md.

Motivation

/2nd-gen/README.md was 25 lines and only pointed back to CONTRIBUTOR-DOCS. A consumer who wanted to use <swc-badge> in their app had nowhere to land. This PR closes the #1 consumer gap with a real "hello world" — install, first component, framework note, where to go next.

Related

• Addresses MVP-α in the approved docs-overhaul-v2 plan
• Supersedes 2nd-gen/packages/swc/.storybook/guides/customization/getting-started.mdx for the onboarding path (the stylesheet-setup content is folded into the new quickstart)

Accessibility testing checklist

Docs-only change — no interactive component surface affected.

• Keyboard — no new focusable components added; existing Storybook navigation unchanged.
• Screen reader — headings, lists, and code blocks render as semantic markdown.

🤖 Generated with Claude Code

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Latest commit: 6f24dd1

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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-6200

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.

[caseyisonit]

basic placeholder getting started, yes you will see the old one still in side bar, this is an iterative evolution so i will not be removing the old on in this PR that will come later.

[caseyisonit]

basic place holder for consumer get started guide. this will change in the final PR of this merge queue when CONTRIBUTOR-DOCS is re-architected to audience based structure.

[caseyisonit]

basic entry point with linking the audience to their next page

[caseyisonit]

template to use for future consumer guides if needed

[caseyisonit]

for some reason these links were broken so replaced with forth coming since this is an old artifact