[Suggestion] Add an "auto-update" property for folders in the IDE

this should work only for external folders. if this is checked, each time you open the project, the IDE looks for all items in this folder
and add them to the project. the actual folder doesnt do that, and I think this would be a valuable new function.
thanks.

Feature requests should be created in Feedback to get reviewed by staff.

<https://xojo.com/issue/45933>