Added world sprite system (#397)

* Added world sprite system

* Added important comment

Resources/Prototypes/_CP14/debug.yml

@@ -0,0 +1,31 @@
+- type: entity
+  parent: BaseItem
+  id: CP14DebugWorldSprite
+  name: strange copper bar
+  suffix: CP, DEBUG
+  components:
+  # Just copy me, I am block with name Bob
+  - type: Appearance
+  - type: CP14WorldSprite
+  - type: GenericVisualizer
+    visuals:
+      enum.WorldSpriteVisualLayers.Layer:
+        world:
+          True:
+            visible: true
+          False:
+            visible: false
+        content:
+          True:
+            visible: false
+          False:
+            visible: true
+  # Just copy me, I am block with name Bob
+
+  - type: Sprite
+    sprite: /Textures/_CP14/Objects/Materials/copper_bar.rsi
+    layers:
+      - map: ["world"]
+        state: bar
+      - map: ["content"]
+        state: bar_2