HandsSystem Refactor (#38438)

* checkpoint

* pt 2

* pt... i forgot

* pt 4

* patch

* More test fixes

* optimization!!!

* the REAL hand system

* fix RetractableItemActionSystem.cs oversight

* the review

* test

* remove test usage of body prototype

* Update Content.IntegrationTests/Tests/Interaction/InteractionTest.cs

Co-authored-by: Tayrtahn <tayrtahn@gmail.com>

* hellcode

* hellcode 2

* Minor cleanup

* test

* Chasing the last of the bugs

* changes

---------

Co-authored-by: Tayrtahn <tayrtahn@gmail.com>

Content.Shared/Nutrition/EntitySystems/FoodSystem.cs

@@ -459,7 +459,7 @@ public sealed class FoodSystem : EntitySystem
 
         var usedTypes = UtensilType.None;
 
-        foreach (var item in _hands.EnumerateHeld(user, hands))
+        foreach (var item in _hands.EnumerateHeld((user, hands)))
         {
             // Is utensil?
             if (!TryComp<UtensilComponent>(item, out var utensil))