Add DPS "run" command to support named command-line arguments

[chuckwondo]

This is a follow-on task from #155.

Since OGC/CWL in DPS invokes an algorithm's "run" command using named (keyword) command line arguments rather than positional arguments (which was the pre-OGC/CWL convention), we must create a run command equivalent to bin/subset.sh that accepts keyword-only rather than positional-only arguments.

Acceptance Criteria:

• A new script named bin/subset-cwl.sh exists and functions identically to bin/subset.sh, but expects keyword-only command line arguments, rather than positional arguments. Alternatively, bin/subset.sh is enhanced to handle keyword-only args, in addition to positional-only args.
• A new version of the GEDI Subsetter algorithm is registered in https://staging.hub.maap-project.org/hub, configured with the new script as its run command.
• The algorithm has been successfully run