Move the current [PEtab tutorial](https://petab.readthedocs.io/en/latest/tutorial.html) to a PEtab v1 section and add an updated version for PEtab v2. (After the v2 yaml file format is finalized -> #609)
Move the current PEtab tutorial to a PEtab v1 section and add an updated version for PEtab v2.
(After the v2 yaml file format is finalized -> #609)