Adds Checkerboard Tiles, External Hull Plating, Hardened Reinforced Floors, & Monotile Dirty Decal (#18676)

* adds checkered floor tiles, hull tiles, and steel monotile decal

* adds checker floors, hull floors, and dirty steel monotile decal

* adds hardened reinf tiles

Resources/Prototypes/Entities/Objects/Misc/tiles.yml

@@ -59,6 +59,30 @@
     graph: TileSteel
     node: steeltile
 
+- type: entity
+  name: steel dark checker tile
+  parent: FloorTileItemSteel
+  id: FloorTileItemSteelCheckerDark
+  components:
+  - type: Sprite
+    state: checker-dark
+  - type: FloorTile
+    outputs:
+      - Plating
+      - FloorSteelCheckerDark
+
+- type: entity
+  name: steel light checker tile
+  parent: FloorTileItemSteel
+  id: FloorTileItemSteelCheckerLight
+  components:
+  - type: Sprite
+    state: checker-light
+  - type: FloorTile
+    outputs:
+      - Plating
+      - FloorSteelCheckerLight
+
 - type: entity
   name: steel tile
   parent: FloorTileItemBase