feat: initial project structure with Snake.Core, CLI and Avalonia skeleton

Snake.CLI/ConsoleRenderer.cs

@@ -0,0 +1,50 @@
+using Snake.Core;
+
+namespace Snake.CLI;
+
+internal static class ConsoleRenderer
+{
+    public static void Render(SnakeGame game)
+    {
+        Console.Clear();
+        Console.WriteLine($"Score: {game.Score}");
+
+        if (game.IsGameOver)
+            Console.WriteLine("Game Over! Press R to restart or Q to quit.");
+
+        var board = game.Board;
+        var snakeCells = game.Snake.Segments.ToHashSet();
+        var food = game.Food.Position;
+
+        Console.Write('+');
+        Console.Write(new string('-', board.Width * 2));
+        Console.WriteLine('+');
+
+        for (var y = 0; y < board.Height; y++)
+        {
+            Console.Write('|');
+
+            for (var x = 0; x < board.Width; x++)
+            {
+                var position = new Position(x, y);
+                var symbol = position == food
+                    ? '@'
+                    : position == game.Snake.Head
+                        ? 'O'
+                        : snakeCells.Contains(position)
+                            ? 'o'
+                            : ' ';
+
+                Console.Write(symbol);
+                Console.Write(' ');
+            }
+
+            Console.WriteLine('|');
+        }
+
+        Console.Write('+');
+        Console.Write(new string('-', board.Width * 2));
+        Console.WriteLine('+');
+        Console.WriteLine("Controls: Arrow keys to move, R to restart, Q to quit.");
+    }
+}