Add initial resource and presenter classes for game entities and effects

Code/Extensions/Vector3Extensions.cs

@@ -0,0 +1,17 @@
+using GameCoreMath = GameCore.Math.Vector3;
+using GodotMath = Godot.Vector3;
+
+namespace CryptonymThunder.Code.Extensions;
+
+public static class Vector3Extensions
+{
+    public static GodotMath ToGodot(this GameCoreMath v)
+    {
+        return new GodotMath(v.X, v.Y, v.Z);
+    }
+
+    public static GameCoreMath ToGameCore(this GodotMath v)
+    {
+        return new GameCoreMath(v.X, v.Y, v.Z);
+    }
+}