v0.0.3

isiteuk 0.0.3

• --metapackage now accepts a zenodo backpack or a .smpkg, matching SingleM.
• Document pixi installation, manual Zenodo download, and that ISITEUK_METAPACKAGE_PATH may point at the extracted directory or the .smpkg.
• Allow polars >1.0 and diamond >=2.1.21.
• Switch releases to bird-release-python (setuptools_scm versioning).
• Require Python 3.8 or newer.