Add Storybook lockfile example and verified case study

[Ayush7614]

Closes #465

Summary

• Adds examples/storybook/ with package.json and yarn.lock pinned to storybookjs/storybook@cc19ae1
• Adds website/docs/case-studies/storybook.md with verified baseline scan results (CVE Lite CLI v1.18.0)
• Documents comparison with default yarn npm audit on the same lockfile (3 entries vs 92 unique CVE Lite findings across 3,008 packages)
• Wires the case study into docs sidebar, README, and examples readme

Scope note

Documentation and example fixture only — no scanner source changes.

[Ayush7614]

@sonukapoor — conflicts with main (after #475 merged) are resolved. Merged latest main into ayush4; Storybook content is unchanged, and both Storybook + Turborepo are wired in the shared docs. Ready for review and merge. Thanks!

[sonukapoor]

The case study content is solid - good verified data, the yarn npm audit comparison (3 vs 92) tells a strong story about what lockfile-wide scanning reveals that default audit scope misses entirely.

Two things before this merges:

Logo should be bundled locally. The current img src points to raw.githubusercontent.com/storybookjs/brand/.... That URL can change or break when the upstream brand repo gets reorganised. The VS Code case study in #484 shows the right pattern - bundle the logo under website/static/img/ and reference it with a site-relative path like /cve-lite-cli/img/storybook-logo.svg. Would be good to match that approach here.

The last commit includes a Cursor co-author line. Co-authored-by: Cursor <cursoragent@cursor.com> will land in git history on merge. Worth squashing that commit into the one before it to keep the history clean. The content is fine - just the attribution.

[Ayush7614]

@sonukapoor — both review items addressed:

1. Logo bundled locally — Storybook wordmark is now at website/static/img/storybook-logo.svg and referenced as /cve-lite-cli/img/storybook-logo.svg in the case study (same pattern as Add VS Code root lockfile example and verified case study #484).

2. Clean commit history — Squashed to a single commit on latest main with Ayush7614 as the only author (no Cursor co-author line).

Also rebased onto current main (includes merged VS Code #484) and resolved conflicts in README.md, website/docs/index.md, and website/sidebars.ts — Storybook and VS Code entries are both present.

Ready for re-review.