v0.2.20250527: rolling release (first hatch release)

What's Changed

• cleanup args handling for .open to make sure positional args for mode etc are supported by @karlicoss in #25

misc changes, should be no-op

• tests: add tests for xz/zstd/gz by @karlicoss in #24
• general: bring ci files up to date; migrate to hatch by @karlicoss in #26

Full Changelog: v0.2.20250118...v0.2.20250527