PAIS for ABM

[DavidKerkmann]

Feature description

For the AIMS project, we need to add post-acute infection syndroms to the model. These should reflect long-term negative syndroms, as in Long-Covid.

Additional context

It has to be decided if implementation should done through the infection states/symptomatic states or as a separate module.

Checklist

• Attached labels, especially loc:: or model:: labels.
• Linked to project.