Ducktools

What's Changed
* Add ducktools-env to project.

What's Changed
* Add ducktools-classbuilder to the meta project

**Full Changelog**: https://github.com/DavidCEllis/ducktools/compare/v0.2.0...v0.3.0

* Add ducktools-pythonfinder to the dependencies to install that module alongside the others

* Add `ducktools-scriptmetadata`
* Bump minimum python to 3.10 (new modules may depend on `prefab_classes` which is 3.10+ only)

Add ducktools-jsonkit

Initial metapackage release.