Add support for disabling ANSI colour output via the --no-color flag
or the NO_COLOR environment variable. The suggested implementation was
inspired by the standards defined at no-color.org
Summary:
This commit adds the ability to add and remove accounts from a list.
The list models has also been updated to change the way lists are
displayed on screen.
Changes:
- Added a subcommand to add accounts to a list.
- Added a subcommand to remove accounts from a list.
- Added a custom error for unknown subcommands.
- Added a custom error when no account IDs are specified when
expected.
