Add an option to lock icons in the dock

### Problem

Currently, when an icon is dragged out of the dock, the icon is removed from the dock, this is very great normally but not for people with poor motor skills or eyesight (such as the elderly). Following the installation of eOS 8 at my grandmother's I noticed that she regularly deleted the dock icons when trying to open an application, which is annoying because she doesn't know how to open an application otherwise.

### Proposal

Would it be possible to add an option in the settings to lock the dock to prevent icons from being accidentally deleted? Ideally, this option would be in elementary OS settings and not with a right click (the top would be to have it accessible only after entering the user session password).

### Prior Art (Optional)

_No response_