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>

Resources/Prototypes/Body/Prototypes/a_ghost.yml

@@ -1,22 +0,0 @@
-- type: body
-  id: Aghost
-  name: "aghost"
-  root: torso
-  slots:
-    torso:
-      part: TorsoHuman
-      connections:
-      - right_arm
-      - left_arm
-    right_arm:
-      part: RightArmHuman
-      connections:
-      - right_hand
-    left_arm:
-      part: LeftArmHuman
-      connections:
-      - left_hand
-    right_hand:
-      part: RightHandHuman
-    left_hand:
-      part: LeftHandHuman