Fixed ImGui and added docking and viewport support

GlitchyEngine/src/Application.bf

@@ -2,6 +2,7 @@ using System;
 using GlitchyEngine.Events;
 using GlitchyEngine.Platform.Windows;
 using GlitchyEngine.Platform.DX11;
+using GlitchyEngine.ImGui;
 
 namespace GlitchyEngine
 {
@@ -14,6 +15,8 @@ namespace GlitchyEngine
 
 		private LayerStack _layerStack = new LayerStack() ~ delete _;
 
+		private ImGuiLayer _imGuiLayer;
+
 		private GameTime _gameTime = new GameTime(true) ~ delete _;
 
 		public bool IsRunning => _running;
@@ -29,6 +32,9 @@ namespace GlitchyEngine
 
 			_window = GlitchyEngine.Window.CreateWindow(WindowDescription());
 			_window.EventCallback = new => OnEvent;
+
+			_imGuiLayer = new ImGuiLayer();
+			PushLayer(_imGuiLayer);
 		}
 
 		public void OnEvent(Event e)
@@ -59,6 +65,8 @@ namespace GlitchyEngine
 
 				_window.Update();
 
+				_imGuiLayer.ImGuiRender();
+
 				DirectX.Present();
 			}
 		}