What is the new feature or improvement?

As first brought up on the Discord server, a way of using natural regeneration as an attribute that is gated behind Diet values would be an interesting new feature.

Some considerations are whether the implementation would function as a toggle or would be able to directly dictate the amount of regeneration that it provides. One issue with directly dictating the amount is how to reconcile this with vanilla natural regeneration which dynamically boosts itself depending on the saturation level.

Also, this might require an additional configuration option to define whether users want to use the vanilla natural regeneration or through Diet's attribute. Off the top of my head I can't think of another way to cleanly define this.