[WP-CLI]: Add command to return list of settings

[seb86]

Describe the solution you'd like

Print out a table listing the settings set for CoCart.

Describe alternatives you've considered

No response

Additional context

Command: wp cocart settings list

OPTIONS

[< filter >…]
Name or partial name to filter the list by.
[--fields=< fields >]
Limit the output to specific fields. Defaults to all fields.
[--format=< format >]
Render output in a particular format.
---
default: table
options:
– table
– csv
– json
---