Organize custom scripts under Assets/Baba_yaga and merge Opsive folders to Assets root

Assets/Baba_yaga/GameSetup/Maze/Extensions.cs

@@ -0,0 +1,25 @@
+using System.Collections.Generic;
+
+namespace Baba_yaga.GameSetup.Maze.Extensions
+{
+    public static class ListExtensions
+    {
+        private static System.Random _rng = new System.Random();
+
+        /// <summary>
+        /// Shuffles a list using the Fisher-Yates algorithm.
+        /// </summary>
+        public static void Shuffle<T>(this IList<T> list)
+        {
+            int n = list.Count;
+            while (n > 1)
+            {
+                n--;
+                int k = _rng.Next(n + 1);
+                T value = list[k];
+                list[k] = list[n];
+                list[n] = value;
+            }
+        }
+    }
+}