`cellsam_pipeline` interface

[rossbar]

I gather that cellsam_pipeline is now intended to be the primary interface for users - i.e. if folks are going to apply cellsam to their own data, they will do so via cellsam_pipeline - is this correct @damaggu @ulisrael @rdilip @m274d ?

Assuming so, the first order of business is to document all of the parameters. There may even be some parameters that do not necessarily need to be exposed to users (e.g. is there ever a use-case where changing chunks would be warranted?).

Of critical importance is the required format for the images going in. E.g. what's the expected order for multiplexed images, what's the expected format for H&E, etc.