v1.1: doctor subcommand, CI, LICENSE, hardening

[arnabdeypolimi]

Summary

• New doctor subcommand diagnoses drift between claude-setup.lock.json and the project's .claude/ directory; reports missing/extra skills and plugins; exits non-zero on drift.
• GitHub Actions CI on Node 18 + 20 — runs node:test suite, validates JSON config files, syntax-checks the installer.
• Hygiene additions: MIT LICENSE, PR template, bug + skill-request issue templates, README badges (release / license / Node version / CI status).
• New test infrastructure using built-in node:test (no new runtime deps): smoke test, doctor unit tests with healthy + drifted fixtures, installer dry-run integration test.
• CHANGELOG.md (Keep a Changelog format) + version bumps to 1.1.0 for both root and create-claude-setup/ packages.

Test plan

• Ran npm test --prefix create-claude-setup — 5/5 pass locally
• Smoke-tested doctor against healthy fixture (exit 0), drifted fixture (exit 1), missing-lock path (exit 2)
• Verified embed-assets.js runs successfully on a clean npm ci
• CI matrix (Node 18 + 20) passes on this PR

🤖 Generated with Claude Code

[arnabdeypolimi]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.

🤖 Generated with Claude Code

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