Added TerraformingTools & functionality

Assets/Scripts/Items/TerraformingTools/TerraformingTool.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace Items.TerraformingTools
+{
+    public abstract class TerraformingTool : UsableItem
+    {
+        public readonly Type TileType;
+
+        protected TerraformingTool(Type tileType, string displayName, string description, int id) : 
+            base(displayName, description, id)
+        {
+            this.TileType = tileType;
+        }
+        
+        
+    }
+}