chore: prepare release v0.3.4

[sjnims]

Version bump to v0.3.4

Changes

Documentation

• Address 20 documentation gaps from claude-docs audit (docs: address 20 documentation gaps from claude-docs audit #203)
  • Added 5 new reference files covering advanced frontmatter, headless/CI mode, GitHub Actions, memory/rules system, and advanced topics
  • Enhanced 6 skills with inline additions and updated trigger phrases
  • Improved coverage of plugin behavior in non-interactive contexts

Checklist

• Version updated in plugin.json, marketplace.json, CLAUDE.md
• CHANGELOG.md updated with release notes
• Markdownlint passes (87 files, 0 errors)
• Plugin tested locally

Full Changelog: v0.3.3...v0.3.4

[claude]

Claude finished @sjnims's task in 35s —— View job

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Review: PR #204 - chore: prepare release v0.3.4

• Run quality checks (markdownlint, prettier, shellcheck)
• Review the diff
• Provide feedback summary

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Verdict: ✅ Looks good

Quality Checks

Check	Result
markdownlint	✅ Pass (0 errors)
prettier	✅ Pass (all files formatted)
shellcheck	⏭️ Skipped (no shell scripts changed)

What's Good

• Version bumped consistently across all 4 required files: plugin.json, marketplace.json, CLAUDE.md, and CHANGELOG.md
• CHANGELOG entry is well-structured, follows Keep a Changelog format, and provides clear detail on the documentation improvements from the claude-docs audit (docs: address 20 documentation gaps from claude-docs audit #203)
• No code changes — purely a version bump release, low risk

Suggestions

None. This is a clean release preparation PR with consistent versioning and a thorough changelog entry.