Add attribute system with core stats and gameplay components

GameCore/Events/EventBus.cs

@@ -0,0 +1,46 @@
+using GameCore.Events.Interfaces;
+
+namespace GameCore.Events;
+
+public class EventBus
+{
+    private readonly Queue<IEvent> _eventQueue = new();
+    private readonly Dictionary<Type, List<Action<IEvent>>> _subscribers = new();
+
+    public void Subscribe<T>(Action<T> listener) where T : IEvent
+    {
+        var eventType = typeof(T);
+        if (!_subscribers.ContainsKey(eventType)) _subscribers[eventType] = [];
+
+        _subscribers[eventType].Add(e => listener((T)e));
+    }
+
+    public void Unsubscribe<T>(Action<T> listener) where T : IEvent
+    {
+        var eventType = typeof(T);
+        if (!_subscribers.TryGetValue(eventType, out var listeners)) return;
+
+        listeners.RemoveAll(e => e.Equals((Action<IEvent>)(e1 => listener((T)e1))));
+
+        if (listeners.Count == 0) _subscribers.Remove(eventType);
+    }
+
+    public void Publish(IEvent gameEvent)
+    {
+        _eventQueue.Enqueue(gameEvent);
+    }
+
+    public void ProcessEvents()
+    {
+        while (_eventQueue.Count > 0)
+        {
+            var gameEvent = _eventQueue.Dequeue();
+            var eventType = gameEvent.GetType();
+
+            if (!_subscribers.TryGetValue(eventType, out var listeners)) continue;
+
+            foreach (var listener in listeners)
+                listener.Invoke(gameEvent);
+        }
+    }
+}