Rewrite NetworkNode

Introducing a composition pattern to NetworkNodes. This makes creating new network nodes significantly easier, as well as improving code readability and maintainability.

addons/HLNC/Addons/NetworkTransform/NetworkTransform.cs

@@ -124,7 +124,7 @@ public override void _PhysicsProcess(double delta)
             {
                 return;
             }
-            if (!IsWorldReady) return;
+            if (!Network.IsWorldReady) return;
             TargetNode.Position = NetPosition;
             TargetNode.Rotation = NetRotation;
         }

addons/HLNC/Addons/NetworkVisibility/NetworkVisibility.cs

@@ -11,8 +11,8 @@ public partial class NetworkVisibility : Node3D
         /// <inheritdoc/>
         public override void _EnterTree()
         {
-            var netParent = GetParentOrNull<NetworkNode3D>();
-            if (netParent.IsCurrentOwner && NetworkRunner.Instance.IsClient)
+            var netParent = GetParentOrNull<INetworkNode>();
+            if (netParent.Network.IsCurrentOwner && NetworkRunner.Instance.IsClient)
             {
                 return;
             }

addons/HLNC/Core/INetworkNode.cs

@@ -0,0 +1,9 @@
+using HLNC.Serialization.Serializers;
+
+namespace HLNC {
+    public interface INetworkNode {
+        public NetworkController Network { get; }
+        public IStateSerializer[] Serializers { get; }
+        public void SetupSerializers();
+    }
+}