Add Capital and Cargo to showcase.md

Add https://github.com/dhorions/Capital-and-Cargo to showcase.md

Showcase.md

@@ -16,10 +16,14 @@
   ![PoshDotnetDumpAnalyzerViewer.png](docfx/images/PoshDotnetDumpAnalyzerViewer.png)  
   ⠀
 * **[TerminalGuiDesigner](https://github.com/tznind/TerminalGuiDesigner)** - Cross platform view designer for building Terminal.Gui applications.
-  ![TerminalGuiDesigner.gif](docfx/images/TerminalGuiDesigner.gif)  
+  ![TerminalGuiDesigner.gif](docfx/images/TerminalGuiDesigner.gif)
+
+* **[Capital and Cargo](https://github.com/dhorions/Capital-and-Cargo)** - A retro console game where you buy, sell, produce and transport goods built with Terminal.Gui
+ ![image](https://github.com/gui-cs/Terminal.Gui/assets/1682004/ed89f3d6-020f-4a8a-ae18-e057514f4c43)
+
   
 # Examples #
 
 * **[C# Example](https://github.com/gui-cs/Terminal.Gui/tree/master/Example)** - Run `dotnet run` in the `Example` directory to run the C# Example.
 * **[F# Example](https://github.com/gui-cs/Terminal.Gui/tree/master/FSharpExample)** - An example showing how to build a Terminal.Gui app using F#.
-* **[Reactive Example](https://github.com/gui-cs/Terminal.Gui/tree/master/ReactiveExample)** - A sample app that shows how to use `System.Reactive` and `ReactiveUI` with `Terminal.Gui`. The app uses the MVVM architecture that may seem familiar to folks coming from WPF, Xamarin Forms, UWP, Avalonia, or Windows Forms. In this app, we implement the data bindings using ReactiveUI `WhenAnyValue` syntax and [Pharmacist](https://github.com/reactiveui/pharmacist) — a tool that converts all events in a NuGet package into observable wrappers. 
+* **[Reactive Example](https://github.com/gui-cs/Terminal.Gui/tree/master/ReactiveExample)** - A sample app that shows how to use `System.Reactive` and `ReactiveUI` with `Terminal.Gui`. The app uses the MVVM architecture that may seem familiar to folks coming from WPF, Xamarin Forms, UWP, Avalonia, or Windows Forms. In this app, we implement the data bindings using ReactiveUI `WhenAnyValue` syntax and [Pharmacist](https://github.com/reactiveui/pharmacist) — a tool that converts all events in a NuGet package into observable wrappers.