Several Vox Sprite Displacement and Layering Fixes (#39219)

* Vox displacement map fixes

* Adds neck displacement map and changes sprite layering to prevent the tank from rendering on top of a Vox's facial hair strangely

Resources/Prototypes/Entities/Mobs/Species/vox.yml

@@ -85,11 +85,11 @@
     - map: [ "outerClothing" ]
     - map: [ "back" ]
     - map: [ "neck" ]
+    - map: [ "suitstorage" ] # This is not in the default order
     - map: [ "enum.HumanoidVisualLayers.FacialHair" ]
     - map: [ "enum.HumanoidVisualLayers.Hair" ]
     - map: [ "enum.HumanoidVisualLayers.HeadSide" ]
     - map: [ "enum.HumanoidVisualLayers.HeadTop" ]
-    - map: [ "suitstorage" ] # This is not in the default order
     - map: [ "enum.HumanoidVisualLayers.Tail" ]
     - map: [ "mask" ]
     - map: [ "head" ]
@@ -137,6 +137,11 @@
           32:
             sprite: Mobs/Species/Vox/displacement.rsi
             state: head
+      neck:
+        sizeMaps:
+          32:
+            sprite: Mobs/Species/Vox/displacement.rsi
+            state: neck
       back:
         sizeMaps:
           32:

Resources/Textures/Mobs/Species/Vox/displacement.rsi/meta.json

@@ -26,6 +26,10 @@
             "name": "head",
             "directions": 4
         },
+        {
+            "name": "neck",
+            "directions": 4
+        },
         {
             "name": "ears",
             "directions": 4