Add attribute system with core stats and gameplay components

GameCore/Physics/VelocityComponent.cs

@@ -0,0 +1,14 @@
+using GameCore.ECS.Interfaces;
+using GameCore.Math;
+
+namespace GameCore.Physics;
+
+/// <summary>
+///     Stores the 3D velocity of an entity.
+///     This component is used by the PhysicsSystem to update the PositionComponent.
+/// </summary>
+public class VelocityComponent : IComponent
+{
+    public Vector3 ActualVelocity;
+    public Vector3 DesiredVelocity;
+}