Validate installations returned by Unity Hub in ListInstalledEditors #35
Description
Repro:
- Install editor x via Unity Hub
- Delete installation files on disk, but not in the Hub
- Now the Hub CLI will continue to report this as an installation in our method ListInstalledEditors
I suggest to do some basic filtering, maybe check if the file (windows) / directory (mac) exists. Within ucll it doesn't really make sense to report "installed editors that are not really installed". For example, in the version-usage command we actually run into problems when we try to check modules installed for an editor that isn't actually on disk.