Renaming, moving, and deleting folders through contextual menu

Overview

Implement a contextual menu for folders. Implement actions for renaming, moving, and deleting folders.

→ See: 🌱 [META] Library organization with folders Active

Proposed resolution

1. Display an icon for opening the contextual menu for a folder.
2. Displaying the contextual menu with an initial set of actions.
3. Implement action for renaming a folder. Handle potential name collisions the same way it was handled in ✨ Displaying and creating folders Active .
4. Implement action for moving a folder. Update the weight property, use that for primary sorting of folders. Sort folders with the same weight alphabetically.
5. Implement action for deleting a folder.
   1. Make sure there is a confirmation dialog, and warn the user that components inside the folder will become unavailable. (They will be disabled, and can only be brought back by re-enabling them at /admin/appearance/component.)
   2. The backend will reject the deletion if any of the component inside the folder are currently in use. Handle this error.

User interface changes