Document command line parameters

[daniel-wer]

From a quick look, not all command line parameters are documented, some of them fairly important, for example --max to specify the maximum down-sampled resolution, or the different interpolation modes. Either, extend the usage examples to include all parameters or better add a section where all of them are explained briefly.

[normanrz]

Would be great if we could generate that from the code. You can always run without args to get the usage printed.

[jstriebel]

Might get fixed via #825

[hotzenklotz]

The switch to typer should cover most of this. It automatically will print all the parameters with --help etc