feat: add jira install-skill command

[rajbdilip]

Summary

• add a root-level jira install-skill command with non-interactive overwrite handling via --force
• package and publish skills/jira/SKILL.md and expand it into a Confluence-style command reference
• document the new command in the README and add focused command tests

Testing

• npm test
• npm run lint
• npm pack
• install the generated tarball into a temp project and run:
  • jira config --help
  • jira install-skill

Closes #30
Reference design discussion: #30 (comment)

[pchuri]

Thanks for the quick turnaround and thorough implementation @rajbdilip — the non-interactive overwrite handling, the npm tarball validation, and the SKILL.md content are all in great shape, and the test coverage is solid (248/248 passing locally).

A few notes inline. Two are correctness items worth addressing before merge (undocumented env vars in SKILL.md, and --dest not expanding ~); the rest are smaller consistency points.

[rajbdilip]

Thanks again, @pchuri, for the careful review and for pointing out the things I missed.

I’ve addressed the comments and amended the existing commit. I usually prefer keeping a PR to a single logical commit, but if you’d rather I use follow-up commits during review for easier change tracking, I’m happy to do that in future PRs.

I also re-validated with:

• npm run lint -- --quiet
• npm test
• npm pack --dry-run --ignore-scripts
• a tarball install smoke test, including jira install-skill --dest '~/skills/jira'

[pchuri]

LGTM — all six review points addressed cleanly:

• JIRA_CLI_CONFIG_PATH / JIRA_CLI_VERBOSE rows removed from SKILL.md
• expandHomePath applied to --dest, with a focused test that mocks os.homedir
• analytics tracking added on both success and failure paths, with overwritten metadata
• async dropped from the action signature and return process.exit(1) cleaned up
• SECURITY.md added to the files array (verified in npm pack --dry-run)

Verified locally: 249/249 tests pass, lint clean, smoke-tested jira install-skill --dest '~/skills/jira' against the real binary — expands correctly to $HOME/skills/jira/SKILL.md.

The security CI job failure is unrelated to this PR — same 3 vulnerabilities (axios, fast-uri, follow-redirects) reproduce on main. Tracking separately in #32.

Approving.

[github-actions]

🎉 This PR is included in version 2.7.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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