Organize elements into Folders

[EmilioPelaez]

• Create new Folder model
  • Should have a name property and an items relationship to Item.
  • Should have an items relationship to Item.
  • Should have a subfolders relationship to Folder.
  • Should have a parent relationship to Folder.
• Update the Item model
  • Add folder relationship from Item to Folder.
• Display Folders in Gallery
  • Update GalleryView or GalleryGridView to display folders and items with no folder and parents.
  • Tapping a Folder should display the items in that folder in the Gallery.
  • Display message for empty folders.
  • Display button to go back to the parent folder.
  • This transition could be done using a NavigationLink to another GalleryView.
  • Another option would be to filter the items in GalleryGridView with a selectedFolder property.
• Add buttons to create folders and move elements
  • Add a button to add folders.
  • Add a button to move items and folders to folders.