Console `clothes` command: prevent saving invalid file paths
While fixing mods, I've seen tons of typos in clothes file paths, like
leatheramror instead of
leatherarmor, etc. The good thing is that the engine behaves well when it sees bogus clothes paths, it just discards it, but since those get hardcoded it's quite annoying anyway.
clothes console command should be improved so that it returns an error message when trying to assign a non existing clothes file, and it should obviously not save it to the map.
I guess I can handle that one since I've added a helper method to check the existence of a file in the