* feat: initial folder ID concept
* feat: parse and use folder ID for import
* feat: export with sensible folder titles
* fix: use path pkg, not filepath
* fix: use title in path
* feat: use only the dir for kube name
* feat: align on one strategy for creating names
* refactor: FolderID is now Folder, our representation of the whole concept
* refactor: move FolderTree to resources package