move backend to subfolder

tanks-backend/TanksServer/Models/Tank.cs

@@ -0,0 +1,34 @@
+using System.Diagnostics;
+using TanksServer.GameLogic;
+
+namespace TanksServer.Models;
+
+internal sealed class Tank(Player player, FloatPosition spawnPosition) : IMapEntity
+{
+    private double _rotation;
+
+    public Player Owner { get; } = player;
+
+    public double Rotation
+    {
+        get => _rotation;
+        set
+        {
+            var newRotation = (value % 1d + 1d) % 1d;
+            Debug.Assert(newRotation is >= 0 and < 1);
+            _rotation = newRotation;
+        }
+    }
+
+    public DateTime NextShotAfter { get; set; }
+
+    public bool Moved { get; set; }
+
+    public FloatPosition Position { get; set; } = spawnPosition;
+
+    public PixelBounds Bounds => Position.GetBoundsForCenter(MapService.TileSize);
+
+    public int Orientation => (int)Math.Round(Rotation * 16) % 16;
+
+    public byte ExplosiveBullets { get; set; }
+}