Add more control libraries

[mrlacey]

https://github.com/xceedsoftware/mauitoolkit

https://www.devexpress.com/mobile-xamarin-maui-free

https://www.nuget.org/packages/Steema.TeeChart.NET.MAUI - beta

https://www.grapecity.com/componentone/maui-ui-controls/ - preview

https://www.syncfusion.com/maui-controls - free trial

https://www.telerik.com/maui-ui - paid

https://mapsui.com/documentation/getting-started-maui.html - prerelease

https://www.nuget.org/packages/Plugin.Maui.KeyListener/ - prerelease

https://www.nuget.org/packages/Plugin.Maui.Calendar