## Summary
Add a GitHub workflow for creating a new release, automatically, when a
new tag is created.
This solves #78. The code is very similar to the changes added in
https://github.com/astral-sh/uv-pre-commit/pull/6
The primary difference, is that the URL points to ruff and this one
checks for if the tag starts with a `v`, but it is optional. This lets
you change ruff versions to not have a `v` in the future. Although the
`mirror.py` will need to be updated.
Speaking of updates to `mirror.py`, I ran `ruff` on it and updated the
`subprocess` to raise an error on failure.
## Test Plan
Locally tested.
