refactor: move extension method to correct place

Author: tnotheis

BuildingBlocks/src/Tooling/Extensions/IEnumerableExtensions.cs

@@ -0,0 +1,9 @@
+namespace Backbone.Tooling.Extensions;
+
+public static class IEnumerableExtensions
+{
+    public static bool IsEmpty<T>(this IEnumerable<T> items)
+    {
+        return !items.Any();
+    }
+}

BuildingBlocks/src/Tooling/Extensions/StringExtensions.cs

@@ -26,9 +26,4 @@ public static byte[] GetBytes(this string text)
     {
         return Encoding.UTF8.GetBytes(text);
     }
-
-    public static bool IsEmpty<T>(this IEnumerable<T> items)
-    {
-        return !items.Any();
-    }
 }