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.Shared/Body/Events/ShiverAttemptEvent.cs

@@ -0,0 +1,14 @@
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.Body.Events
+{
+    public class ShiverAttemptEvent : CancellableEntityEventArgs
+    {
+        public ShiverAttemptEvent(EntityUid uid)
+        {
+            Uid = uid;
+        }
+
+        public EntityUid Uid { get; }
+    }
+}

Content.Shared/Body/Events/SweatAttemptEvent.cs

@@ -0,0 +1,14 @@
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.Body.Events
+{
+    public class SweatAttemptEvent : CancellableEntityEventArgs
+    {
+        public SweatAttemptEvent(EntityUid uid)
+        {
+            Uid = uid;
+        }
+
+        public EntityUid Uid { get; }
+    }
+}