Enable Shift+A to Add Objects in Sculpt Mode With Mask Handling and Split Option

I'd like to propose enabling the Shift+A shortcut (Add Menu) while in Sculpt Mode, allowing users to add new objects directly into the scene without switching to Object Mode.

The feature would work like this:

When a new object is inserted while sculpting, the existing mesh remains masked, and the new object is inserted unmasked.

This makes it easier to sculpt details on the new piece without affecting the original mesh.

Additionally, a "Split Mask" button could be added. This would:

Instantly separate the masked part of the mesh into a new object.

Making it fast and clean to isolate elements for kitbashing or modular sculpting workflows.

This would streamline sculpting workflows dramatically, especially for artists who build complex forms by merging or splitting objects on the fly.