Cookieplone

Internal:

- Use `gh:plone/cookieplone-templates` as the default repository [ericof] [13](https://github.com/plone/cookieplone/issues/13)

Internal:

- Move from poetry to hatch to manage the environment [ericof] [9](https://github.com/plone/cookieplone/issues/9)


Documentation:

- Initial documentation (README.md) for cookieplone [ericof] [8](https://github.com/plone/cookieplone/issues/8)