Add basalt tiles (#13462)

Resources/Prototypes/Decals/rock.yml

@@ -0,0 +1,62 @@
+- type: decal
+  id: Basalt1
+  tags: ["rock"]
+  sprite:
+    sprite: Decals/basalt.rsi
+    state: basalt1
+
+- type: decal
+  id: Basalt2
+  tags: ["rock"]
+  sprite:
+    sprite: Decals/basalt.rsi
+    state: basalt2
+
+- type: decal
+  id: Basalt3
+  tags: ["rock"]
+  sprite:
+    sprite: Decals/basalt.rsi
+    state: basalt3
+
+- type: decal
+  id: Basalt4
+  tags: ["rock"]
+  sprite:
+    sprite: Decals/basalt.rsi
+    state: basalt4
+
+- type: decal
+  id: Basalt5
+  tags: ["rock"]
+  sprite:
+    sprite: Decals/basalt.rsi
+    state: basalt5
+
+- type: decal
+  id: Basalt6
+  tags: ["rock"]
+  sprite:
+    sprite: Decals/basalt.rsi
+    state: basalt6
+
+- type: decal
+  id: Basalt7
+  tags: ["rock"]
+  sprite:
+    sprite: Decals/basalt.rsi
+    state: basalt7
+
+- type: decal
+  id: Basalt8
+  tags: ["rock"]
+  sprite:
+    sprite: Decals/basalt.rsi
+    state: basalt8
+
+- type: decal
+  id: Basalt9
+  tags: ["rock"]
+  sprite:
+    sprite: Decals/basalt.rsi
+    state: basalt9