Single file minimum F# Avalonia UI app with notes.

After some experimentation, a minimum Avalonia app that can be ran from an .fsx file or a Polyglot Notebook. The Polyglot Notebook can be found at: https://github.com/Fxplorer/Fxplorer_www/blob/main/docs/MinimumFsharpAvaloniaApp.ipynb The .fsx script...