Melting folders away/#5524

Folder Typeπ

It is not clear to me why we should need a special folder type. What if any task can serve as a folder? this would also make it easier to explain streber to users.

Use tags instead of foldersπ

Folders they are used when in fact we would need tags to group items. i can have it in only one folder (the parent task if any), but can add multiple tags to an item.
See implementing tags.