move backend to subfolder

tanks-backend/TanksServer/Models/Bullet.cs

@@ -0,0 +1,16 @@
+namespace TanksServer.Models;
+
+internal sealed class Bullet(Player tankOwner, FloatPosition position, double rotation, bool isExplosive, DateTime timeout) : IMapEntity
+{
+    public Player Owner { get; } = tankOwner;
+
+    public double Rotation { get; } = rotation;
+
+    public FloatPosition Position { get; set; } = position;
+
+    public bool IsExplosive { get; } = isExplosive;
+
+    public DateTime Timeout { get; } = timeout;
+
+    public PixelBounds Bounds => new (Position.ToPixelPosition(), Position.ToPixelPosition());
+}