Added ForEach extension to Linq

Author: szv

src/Codebreaker.WinUI/Helpers/LinqExtensions.cs

@@ -0,0 +1,22 @@
+namespace System.Linq;
+
+internal static class LinqExtensions
+{
+    public static IEnumerable<T> Foreach<T>(this IEnumerable<T> enumerable, Action<T> action)
+    {
+        foreach (var item in enumerable)
+            action(item);
+
+        return enumerable;
+    }
+
+    public static IEnumerable<T> Foreach<T>(this IEnumerable<T> enumerable, Action<T, int> action)
+    {
+        int i = 0;
+
+        foreach (var item in enumerable)
+            action(item, i++);
+
+        return enumerable;
+    }
+}