chore(main): release 0.6.0

[williamzujkowski]

🤖 This PR was opened by release-please.

I had to open it manually this time — release-please's automated PR creation hit the org-level restriction "GitHub Actions is not permitted to create or approve pull requests". The branch + commit it prepared (3e50b34) are exactly as release-please intended; future runs (after the org setting is fixed — see new issue #186) will manage this PR automatically.

---

🤖 Release 0.6.0

Features

• add RSS feed for recent US Code updates
• ci: migrate release flow to release-please (feat(ci): migrate release flow to release-please #185)
• cross-chapter navigation at section boundaries
• fetcher: add CLI entry point and observability metrics
• fetcher: add historical release point enumeration and UX fixes
• Public Sans font + homepage hero redesign
• QA fixes batch — copy cite, 404, Schema.org, keyboard nav, empty state
• subsection anchor links with :target highlighting
• transformer: add 'status' frontmatter field for section state
• upgrade to Astro 6, Zod 4, @astrojs/svelte 8
• Version timeline redesign + dependency fixes + import observability
• web: auto-link cross-references, focus mode, TOC, change indicators, 3-column layout (enhance: Add auto-generated table of contents for statute pages #71-148, many)

Full diff in CHANGELOG.md.

What merging this does

1. Tags v0.6.0 on main
2. Publishes a GitHub Release

🤖 Generated with Claude Code

[williamzujkowski]

Correction to the PR body: the related org-setting issue is #187, not #186 (this PR). Apologies for the typo.