[Add] Menu with configs and size fix

Assets/Runtime/Core/GameSettingsValue.cs

@@ -0,0 +1,21 @@
+namespace Minesweeper.Core
+{
+    public readonly struct GameSettingsValue
+    {
+        public GameSettingsValue(int sizeX, int sizeY, int minesCount)
+        {
+            SizeX = sizeX;
+            SizeY = sizeY;
+            MinesCount = minesCount;
+        }
+
+        public int SizeX { get; }
+        public int SizeY { get; }
+        public int MinesCount { get; }
+
+        public bool Equals(GameSettingsValue other)
+        {
+            return SizeX == other.SizeX && SizeY == other.SizeY && MinesCount == other.MinesCount;
+        }
+    }
+}