How to allow for starting using URI protocol activation?

With URI protocol activation, the URI of the (custom) protocol will be passed as the first argument on the command line, like this:
```
myapp.exe myscheme://90413064-fa7f-4750-afa6-2f34047042ca
```

How can we best support this in parallel to supporting commands set using `System.CommandLine`, like
```
myapp.exe mycommand --myoption
```

https://docs.microsoft.com/en-us/windows/win32/shell/app-registration
https://blog.magnusmontin.net/2019/05/10/handle-protocol-activation-and-redirection-in-packaged-apps/