Files cleanup on shutdown

[gitesthuman]

Pull request review checklist 📝 ✅

This is a checklist that helps conduct a pull request review properly. These points are required to merge the PR

• There are no merge conflicts

• The pull request is named accordingly (description of the functionality - it
  will be visible in the changelog later)

• Every task requirement (from Jira) is done

• The app runs, it boots up properly (e.g. no syntax errors)

• The proposed functionality is working properly (you need to pull this branch
  and check for yourself)

• Each function, class or functionality is properly documented
  (short description of what it does, parameters or return values if they need
  any explanation)

[pcichowski]

co z obrazami map?

[gitesthuman]

co z obrazami map?

maps are required for existing games

we can clean unused ones on bot start but that requires loading data into Multiverse