While installing, select the following workloads and components:
select .NET Desktop Development.
Then in the Installation details pane of the installation dialog box, select Windows App SDK C# Templates (at the bottom of the list).
Clone the solution.
open Totoro.WinUI\Totoro.GUI.sln with visual studio
Make sure Totoro.WinUI is the startup project (it would be bold)
if not right click and set as startup project
Fill client id/secrets in appsettings.json
Click the play button (Totoro.WinUI unpackaged)
App should start running.
I'd like to test the app after committing a fix or adding a new feature to ensure that everything works as intended.