Add initial resource and presenter classes for game entities and effects

Code/Resources/EntityArchetype.cs

@@ -0,0 +1,11 @@
+using Godot;
+using Godot.Collections;
+
+namespace CryptonymThunder.Code.Resources;
+
+[GlobalClass]
+public partial class EntityArchetype : Resource
+{
+    [Export] public PackedScene Scene { get; set; }
+    [Export] public Array<Resource> ComponentResources { get; set; } = [];
+}