Convert StomachBehavior to a component/system + rejig body namespaces (#5249)

* Convert StomachBehavior to a component/system + rejig body namespaces

* test

* slightly more namespace changes

* remove

* Hello?????

* fuck you github test runner

* reviews

* oobsy!

Content.Server/Body/Scanner/BodyScannerComponent.cs

@@ -1,6 +1,5 @@
 using Content.Server.UserInterface;
 using Content.Shared.Body.Components;
-using Content.Shared.Body.Scanner;
 using Content.Shared.Interaction;
 using Robust.Server.GameObjects;
 using Robust.Shared.GameObjects;