Add GitHub Actions workflow for automatic releases

[s2x]

Summary

This PR adds a GitHub Actions workflow that automatically creates GitHub releases when version tags are pushed.

Changes

• Added .github/workflows/release.yaml
• Workflow triggers on tags starting with v (e.g., v1.0.0)
• Uses softprops/action-gh-release@v2 for creating releases
• Automatically generates release notes based on merged PRs and commits

How to use

After merging, simply push a new tag to create a release:

git tag v0.12.0
git push origin v0.12.0

The workflow will automatically create a GitHub release with generated release notes.

Closes #77

[s2x]

Code Review Summary

Strengths

• Uses pinned versions for actions
• Minimal permissions (only contents: write)
• Simple and focused workflow

Issues Found

Important:

• Permissions should be at the top level, not job level

Minor:

• Consider using SHA pins instead of version tags for better security

Recommendation

The workflow is well-structured. Consider moving the permissions block to the top level of the workflow file for better clarity.

Verdict: Approved with minor suggestions.