[Feature]: adding an existing record to a one-to-many relation

[andybubbl]

Description

Currently this is possible with the many to many relation but it would be useful to have this on one to many too.
For example i have a users resource. Users can have multiple addresses. I cant currently add an existing address to a user through the admin panel.

Suggested Solution

Add the "Add Existing" button to one to many relations

Alternatives

No response

Additional Context

No response