add --listpagesizes (similar to --listdevices)

[muescha]

Is your feature request related to a problem? Please describe.

For devices I can list the current devices with --listdevices. But not for pagesizes. I have to look at the source code to see it:

naps2/NAPS2.Sdk/Images/PageSize.cs

Lines 31 to 38 in d31643a

	"letter" => Letter,
	"legal" => Legal,
	"a5" => A5,
	"a4" => A4,
	"a3" => A3,
	"b5" => B5,
	"b4" => B4,
	_ => null

Describe the solution you'd like

It would be nice to have a --listprofiles

Describe alternatives you've considered

add to doc command-line#scanning-options and to --help the full list of available sizes

Additional context

[muescha]

Bonus point:
Provide a list of “recently used page sizes” that are not in the well-known list, so they can be used as input for the --pagesize option.