default to prompt for subjectAltName for compatibility and security

Several organizations and software packages (Chrome, Firefox, Safari, Apple, Mozilla, Google) have moved to not trust certificates unless the Subject Alternative Name is filled out with FQDN, hostname, or other relevant info.

The script already allows for this with the command line args to the create command.

Recommend default to prompting for this info.

Start at the create command and review its existing command-line arguments for Subject Alternative Name input. The change is complete when certificate creation prompts for the relevant hostname or other SAN information by default while preserving the existing argument-based support.

Written by the indexing model from the issue text.