Create "proksee evaluate" Command

[emarinier]

This command would run the evaluation part of proksee assemble on an existing assembly are report on its quality / "goodness".

It would possibly be run as proksee evaluate or proksee assemble evaluate.

[emarinier]

Resources:

• https://stackoverflow.com/questions/34643620/how-can-i-split-my-click-commands-each-with-a-set-of-sub-commands-into-multipl
• https://click.palletsprojects.com/en/6.x/quickstart/#nesting-commands

[emarinier]

Ongoing in #41

[emarinier]

merged