Unxt

<!-- Release notes generated using configuration in .github/release.yml at main -->

What's Changed
* build: move lightweight zeroth to deps by nstarman in https://github.com/GalacticDynamics/unxt/pull/243
* feat: move distance to coordinax by nstarman in https://github.com/GalacticDynamics/unxt/pull/242
* feat: block_until_ready method by nstarman in https://github.com/GalacticDynamics/unxt/pull/246


**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.19.0...v0.20.0

<!-- Release notes generated using configuration in .github/release.yml at main -->

What's Changed
* build: add author info by nstarman in https://github.com/GalacticDynamics/unxt/pull/222
* ci: more uv by nstarman in https://github.com/GalacticDynamics/unxt/pull/223
* Add concept of unitsystem flags and enable overriding / extending unit systems by adrn in https://github.com/GalacticDynamics/unxt/pull/219
* Add support for dynamical simulation unit systems (G=1 or other value) by adrn in https://github.com/GalacticDynamics/unxt/pull/225
* refactor: refactor `can_convert_unit` to `is_unit_convertible` by nstarman in https://github.com/GalacticDynamics/unxt/pull/226
* Fix typo in SI by adrn in https://github.com/GalacticDynamics/unxt/pull/235
* Add SI and CGS unit systems by adrn in https://github.com/GalacticDynamics/unxt/pull/236
* Update minimum jax/jaxlib versions by ColmTalbot in https://github.com/GalacticDynamics/unxt/pull/238
* ci: fix attestation by nstarman in https://github.com/GalacticDynamics/unxt/pull/239
* ci: bump attestation by nstarman in https://github.com/GalacticDynamics/unxt/pull/240

New Contributors
* ColmTalbot made their first contribution in https://github.com/GalacticDynamics/unxt/pull/238

**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.18.1...v0.19.0

What's Changed
* feat: runtime typechecker by nstarman in https://github.com/GalacticDynamics/unxt/pull/191
* Update pyproject.toml by nstarman in https://github.com/GalacticDynamics/unxt/pull/220
* Strip spaces from physical type names by adrn in https://github.com/GalacticDynamics/unxt/pull/221

New Contributors
* adrn made their first contribution in https://github.com/GalacticDynamics/unxt/pull/221

**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.18.0...v0.18.1

What's Changed
* refactor: rename constructor to from_ by nstarman in https://github.com/GalacticDynamics/unxt/pull/215


**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.17.1...v0.18.0

What's Changed
* feat: better unit conversion by nstarman in https://github.com/GalacticDynamics/unxt/pull/207
* refactor: set up uv by nstarman in https://github.com/GalacticDynamics/unxt/pull/210
* fix: pickling parametric types by nstarman in https://github.com/GalacticDynamics/unxt/pull/209
* build(deps): bump codecov/codecov-action from 4.5.0 to 4.6.0 in the actions group by dependabot in https://github.com/GalacticDynamics/unxt/pull/212
* chore: update pre-commit hooks by pre-commit-ci in https://github.com/GalacticDynamics/unxt/pull/213


**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.17.0...v0.17.1

What's Changed
* feat: quantity sub-package by nstarman in https://github.com/GalacticDynamics/unxt/pull/206


**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.16.3...v0.17.0