Allow users to enter custom list of items for each content item

[mdameer]

Is your feature request related to a problem? Please describe.

Currently, no field allows users to enter a custom list of items for each content item.

Describe the solution you'd like

Enhance the MultiTextField with a new editor called EditableList, which will let users define default items (Array of strings not options like current editors) for new content items, then can be managed from the content item edit screen, allowing users to add, remove, or edit items as needed.

Describe alternatives you've considered

Adding a new field to handle this feature, but extending MultiTextField seems feasible and efficient.