Refactor pause handling; implement GameBus for pause state management and update event popup behavior

Scripts/Components/EventManager.cs

@@ -50,7 +50,7 @@ public partial class EventManager : Node
     
     private void FireEvent(EventDefinition eventDef)
     {
-        GetTree().Paused = true;
+        GameBus.Instance.SetPause(true);
 
         var popup = _eventPopupScene.Instantiate<EventPopup>();
         _eventPopupContainer.AddChild(popup);

Scripts/Components/PauseManager.cs

@@ -1,4 +1,5 @@
 using Godot;
+using ParasiticGod.Scripts.Singletons;
 
 namespace ParasiticGod.Scripts.Components;
 
@@ -13,17 +14,30 @@ public partial class PauseManager : CanvasLayer
         ProcessMode = ProcessModeEnum.Always;
         _pauseMenu.Hide();
         _pauseButton.Pressed += TogglePause;
+        
+        GameBus.Instance.PauseStateChanged += OnPauseStateChanged;
     }
 
     public override void _Input(InputEvent @event)
     {
         if (@event.IsActionPressed("pause")) TogglePause();
     }
+    
+    public override void _ExitTree()
+    {
+        if (GameBus.Instance != null)
+        {
+            GameBus.Instance.PauseStateChanged -= OnPauseStateChanged;
+        }
+    }
 
     private void TogglePause()
     {
-        var isPaused = !GetTree().Paused;
-        GetTree().Paused = isPaused;
+        GameBus.Instance.SetPause(!GetTree().Paused);
+    }
+    
+    private void OnPauseStateChanged(bool isPaused)
+    {
         _pauseMenu.Visible = isPaused;
     }
 }