refactor: move global classes def into package

GlobalClasses/Scenes/RootScene.cs

@@ -0,0 +1,46 @@
+using Godot;
+using Polonium.Attributes;
+using Polonium.Interfaces;
+
+namespace GlobalClasses;
+[ProxyNode]
+[GlobalClass]
+[Tool]
+[RegistryEntity]
+public partial class RootScene : Scene
+{
+    private Scene CurrentScene { get; set; }
+    
+    public void SwitchScene(Scene scene)
+    {
+        if (CurrentScene != null)
+            RemoveChild(CurrentScene);
+        AddChild(scene);
+        CurrentScene = scene;
+    }
+
+    public override void _Ready()
+    {
+        GlobalRegistry.RootScene = this;
+        base._Ready();
+    }
+    
+    [ProxyMethod]
+    public virtual void Enter()
+    {
+    }
+
+    public override void _EnterTree()
+    {
+        Enter();
+        base._EnterTree();
+    }
+
+    public override void _Process(double delta)
+    {
+        if(!GlobalRegistry.Paused)
+            foreach (ITimeConsumer tc in GlobalRegistry.TimeConsumers)
+                tc.Process(delta);
+        base._Process(delta);
+    }
+}