Field group commands.
- wp types field group add_field --domain=<string> --group_slug=<string> --field_slug=<string>
- wp types field group create [--name=<string>] [--title=<string>] [--domain=<domain>] [--status=<bool>]
- wp types field group delete <id> [--force=<bool>]
- wp types field group empty
- wp types field group generate [--count=<number>] [--domain=<domain>]
- wp types field group list [--domain=<domain>] [--status=<status>] [--format=<format>]
- wp types field group set_display_conditions --domain=<string> --group_slug=<string> [--post_types=<string>] [--terms=<string>] [--taxonomy=<string>] [--template=<string>] [--operator=<string>]