replaced imgui with cimgui shared lib to use with c# bindings

src-csharp/ExampleComponent.cs

@@ -1,4 +1,5 @@
 using System;
+using Hexa.NET.ImGui;
 
 namespace Ougge;
 
@@ -11,5 +12,8 @@ public class ExampleComponent : Component
     public override void Update(double deltaTime)
     {
         Console.WriteLine($"C# deltaTime {deltaTime} object id {Owner.Id}");
+        ImGui.Begin("C# WINDOW");
+        ImGui.Text("Hello from ExampleComponent!");
+        ImGui.End();
     }
 }