add ground decor

Assets/Decors/ground.yaml

@@ -0,0 +1,36 @@
+uuid: d08e55c0-2fef-43a2-9198-cfba767ae7ac
+title: ground
+image: ground.png
+editor:
+  folders: []
+  gridWidth: 8
+  gridHeight: 8
+  showGrid: true
+  checkerboardWidth: 8
+  checkerboardHeight: 8
+  author: no one
+  creationTime: Sat Jan 29 2022 00:42:47 GMT-0800 (Pacific Standard Time)
+  modificationTime: Sat Jan 29 2022 00:42:47 GMT-0800 (Pacific Standard Time)
+generate_decorations: true
+decorations:
+  - uuid: e428810f-2207-4ec7-8b85-a81c6ed16c9d
+    title: new decoration
+    editor:
+      tags: []
+      folder: ""
+    frames:
+      - parts:
+          - palettes: ""
+            palette: ""
+            x: 0
+            y: 0
+            clipX: 0
+            clipY: 0
+            clipWidth: 32
+            clipHeight: 32
+            alpha: 1
+            rotation: 0
+            mirror: false
+        frame_time: 100
+    width: 32
+    height: 32