[Test] Add unit tests for base code

Assets/Scripts/AppleHillsScripts.asmdef

@@ -0,0 +1,21 @@
+{
+    "name": "AppleHillsScripts",
+    "rootNamespace": "",
+    "references": [
+        "PixelplacementAssembly",
+        "Unity.Addressables",
+        "AstarPathfindingProject",
+        "Unity.ResourceManager",
+        "Unity.InputSystem",
+        "Unity.TextMeshPro"
+    ],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": [],
+    "noEngineReferences": false
+}

Assets/Scripts/AppleHillsScripts.asmdef.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: d91d3f46515a6954caa674697afbf416
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Utils/AppleHillsUtils.cs

@@ -19,7 +19,7 @@ namespace Utils
             to.color = from.color;
             to.flipX = from.flipX;
             to.flipY = from.flipY;
-            to.material = from.material;
+            to.sharedMaterial = from.sharedMaterial; // Use sharedMaterial instead of material to avoid instantiation in edit mode
             to.drawMode = from.drawMode;
             to.size = from.size;
             to.maskInteraction = from.maskInteraction;