New version v2.4.0

Mostly a maintencance release.

- Only python version >=3.9 are supported.
- Major restructuring of the documentation. Some examples are now included directlyr as jupyter notebooks.
- some minor bugfixes for slab models and plotting routines.
  • Only python version >=3.9 are supported.
  • Major restructuring of the documentation. Some examples are now included directly in jupyter notebooks.
  • some bugfixes for slab models and plotting routines.