Add dedicated release workflow with PyPI trusted publishers

[tonybaloney]

Summary

Separates the release pipeline from CI into a dedicated workflow triggered by GitHub Releases.

Changes

New: .github/workflows/release.yml

• Trigger: release published event - runs when a GitHub Release is created/published
• Builds: sdist + wheels for all platforms (Linux x86_64/aarch64, macOS aarch64, Windows x86_64/aarch64) for Python 3.10-3.14
• Validation: twine check --strict on all wheels, zip integrity verification
• Publish: uv publish --trusted-publishing always (PyPI OIDC trusted publishers)
• Assets: All dist files attached to the GitHub Release
• Requires a release environment with id-token: write permission

Updated: .github/workflows/ci.yml

• Removed the inline release job (publishing now handled by release.yml)
• Removed v2 branch and tag triggers (v2 is merged into master)
• Kept build validation jobs (sdist + wheel builds + twine check) so packaging issues are caught in CI before release

Release workflow

1. Push commits to master, CI validates tests + lints + builds
2. Create a GitHub Release (tag it e.g. v2.0.0 or v2.0.0a1)
3. Release workflow builds all wheels, publishes to PyPI, attaches assets to the release

Notes

• PyPI trusted publisher must be configured on pypi.org for tonybaloney/wily with workflow release.yml and environment release
• The release GitHub environment should be configured with any required reviewers/protection rules

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.35%. Comparing base (457096c) to head (94828ce).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #251   +/-   ##
=======================================
  Coverage   90.35%   90.35%           
=======================================
  Files          20       20           
  Lines        1192     1192           
  Branches      161      161           
=======================================
  Hits         1077     1077           
  Misses         87       87           
  Partials       28       28           

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