v0.1.0

Add CI + release workflows (GitHub Release + PyPI publish job) (#2)

CI (.github/workflows/ci.yml): runs on push/PR to master across Python
3.9/3.11/3.12 — installs the package, smoke-tests `porypal-fe8 --help`,
an import check, a self-contained Pillow-generated extract test that
asserts a valid <=16-colour JASC .pal, and a wheel+sdist build.

Release (.github/workflows/release.yml): on `v*` tags, builds and attaches
the wheel+sdist to a GitHub Release; a separate `pypi` job publishes via
OIDC trusted publishing so the Release succeeds even before PyPI is set up.

Co-authored-by: laqieer <zhiwenzhu@microsoft.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>