feat(release): add release-it for automated versioning

[SpiGAndromeda]

Summary

This pull request introduces automated versioning and release management using release-it.

Changes:

• Added .release-it.json configuration for pre-release validation, GitHub release automation, semantic versioning, and post-release distribution building.
• Updated package.json with release-it dependency and release scripts (release, release:dry-run, release:ci).
• Documented the release process in CONTRIBUTING.md, including a maintainer guide, prerequisites, command reference, and configuration details.

Testing

Run npm run release:dry-run to test the release process without making actual changes.

Related

Prepares for the upcoming v0.1.0 release.

🤖 Generated with Claude Code

[github-actions]

🤖 AI Validation Results

Status: ⚠️ Passed with Warnings

Your contribution looks good, but consider these suggestions for improvement.

📋 Issues Found:

• Commit messages are not consistently formatted according to the conventional commits specification. Some commit messages are too long and should be split.

⚠️ Suggested Improvements:

📝 Suggested PR Title:

feat(release): Add release-it for automated versioning and releases

📋 Suggested Commit Message:

- feat(release): Add release-it for automated versioning and releases
- docs(release): Add maintainer release process documentation
- docs(release): Compact release process documentation for clarity
- ci(workflow): Add build verification step

📄 Suggested PR Description:

## Summary

This pull request introduces automated versioning and release management using release-it.

### Changes:

- Added `.release-it.json` configuration for pre-release validation, GitHub release automation, semantic versioning, and post-release distribution building.
- Updated `package.json` with release-it dependency and release scripts (`release`, `release:dry-run`, `release:ci`).
- Documented the release process in `CONTRIBUTING.md`, including a maintainer guide, prerequisites, command reference, and configuration details.

### Testing

Run `npm run release:dry-run` to test the release process without making actual changes.

### Related

Prepares for the upcoming v0.1.0 release.

---

Automated validation based on contribution guidelines
Last updated: 2025-08-23 13:38:48 UTC

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.33%. Comparing base (b9bd9b0) to head (e2b4991).

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #8   +/-   ##
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  Coverage   98.33%   98.33%           
=======================================
  Files           4        4           
  Lines         542      542           
  Branches      120      102   -18     
=======================================
  Hits          533      533           
  Misses          6        6           
  Partials        3        3           

Flag	Coverage Δ
unittests	98.33% <ø> (ø)

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