Add "Season" column #815
Description
So, I was interested in adding a column (and search filter) for the recently added "Season" detail, but when trying to display it in the Qt UI I had to find out that it does not have the details readily available. Heck, the modal backing the table does not even have a reference to the engine instance, so I can't even query for the show details, which makes me wonder whether the "Season" would need to be added to the show's main fields instead of just in the show details.
However, before I am doing that, I would like to clarify whether this is the correct way and whether it is actually worthwhile, i.e. there is interest in it.
Edit: Also, having worked with a couple Python projects that have proper typing information and a language server, trackma is in dire need of some as well as it makes code navigation just so much easier.