feat: added revised version of the old networking system

Shared/Network/NetworkManager.cs

@@ -0,0 +1,36 @@
+using System.Collections.Generic;
+
+using Syntriax.Engine.Core;
+
+namespace Syntriax.Engine.Network;
+
+public class NetworkManager : UniverseObject, INetworkManager
+{
+    public INetworkCommunicator NetworkCommunicator { get; set; } = null!;
+
+    private readonly Dictionary<string, INetworkEntity> _networkEntities = [];
+    public IReadOnlyDictionary<string, INetworkEntity> NetworkEntities => _networkEntities;
+
+    private readonly BehaviourCollector<INetworkEntity> _networkEntityCollector = new();
+    public IBehaviourCollector<INetworkEntity> NetworkEntityCollector => _networkEntityCollector;
+
+    public NetworkManager()
+    {
+        _networkEntityCollector.OnCollected += OnCollected;
+        _networkEntityCollector.OnRemoved += OnRemoved;
+    }
+
+    private void OnCollected(IBehaviourCollector<INetworkEntity> sender, INetworkEntity behaviourCollected)
+    {
+        if (!_networkEntities.TryAdd(behaviourCollected.Id, behaviourCollected))
+            throw new($"Unable to add {behaviourCollected.Id} to {nameof(NetworkManager)}");
+    }
+
+    private void OnRemoved(IBehaviourCollector<INetworkEntity> sender, INetworkEntity behaviourRemoved)
+    {
+        _networkEntities.Remove(behaviourRemoved.Id);
+    }
+
+    protected override void OnEnteringUniverse(IUniverse universe) => _networkEntityCollector.Assign(universe);
+    protected override void OnExitingUniverse(IUniverse universe) => _networkEntityCollector.Unassign();
+}