Unxt

What's Changed
* refactor: quantities as a module by nstarman in https://github.com/GalacticDynamics/unxt/pull/87
* build(deps): bump the actions group with 1 update by dependabot in https://github.com/GalacticDynamics/unxt/pull/89
* chore: update pre-commit hooks by pre-commit-ci in https://github.com/GalacticDynamics/unxt/pull/90
* feat: more explicit API and functional approach by nstarman in https://github.com/GalacticDynamics/unxt/pull/91


**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.8.1...v0.9

What's Changed
* fix: promotion in Distance by nstarman in https://github.com/GalacticDynamics/unxt/pull/88


**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.8...v0.8.1

What's Changed
* Refactor unitsystems by nstarman in https://github.com/GalacticDynamics/unxt/pull/83
* Distance class by nstarman in https://github.com/GalacticDynamics/unxt/pull/84
* fix: distance constructor by nstarman in https://github.com/GalacticDynamics/unxt/pull/85
* feat: add parallax distance constructor by nstarman in https://github.com/GalacticDynamics/unxt/pull/86


**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.6.3...v0.8

What's Changed
* Refactor unitsystems by nstarman in https://github.com/GalacticDynamics/unxt/pull/83


**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.6.3...v0.7

What's Changed
* docs: zenodo badge by nstarman in https://github.com/GalacticDynamics/unxt/pull/78
* chore: update pre-commit hooks by pre-commit-ci in https://github.com/GalacticDynamics/unxt/pull/79
* refactor: move no-op class_getitem to UncheckedQuantity by nstarman in https://github.com/GalacticDynamics/unxt/pull/80
* feat: argnums arg to grad by nstarman in https://github.com/GalacticDynamics/unxt/pull/81
* feat: NAMED_UNIT_SYSTEMS registry by nstarman in https://github.com/GalacticDynamics/unxt/pull/82


**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.6.2...v0.6.3

This release is to trigger Zenodo

**Full Changelog**: https://github.com/GalacticDynamics/unxt/compare/v0.6.1...v0.6.2