`bin/gemstash` fails with `Could not find command "readme"`

[technicalpickles]

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This is specifically about running gemstash in development, but I'm able to do things like bin/gemstash start, but bin/gemstash or anything that would do help usage fails like:

❯ bin/gemstash                                                                                                                                                                                                  
Could not find command "readme".

This is the only place I can find readme mentioned:

https://github.com/rubygems/gemstash/blob/e0e1b4b920ac29b9f777e0cd0b9325e3d73f5259/lib/gemstash/cli.rb#L40-L49