Fixed ImGui and added docking and viewport support

GlitchyEngine/src/ImGui/ImGuiRenderEvent.bf

@@ -0,0 +1,23 @@
+using GlitchyEngine.Events;
+
+namespace GlitchyEngine.Events
+{
+	extension EventType
+	{
+		case ImGuiRender;
+	}
+}
+
+namespace GlitchyEngine.ImGui
+{
+	public class ImGuiRenderEvent : Event, IEvent
+	{
+		public override EventType EventType => .ImGuiRender;
+
+		public override EventCategory Category => .Application;
+
+		public override System.StringView Name => "ImGuiRender";
+
+		public static EventType StaticType => .ImGuiRender;
+	}
+}