generate mode accepts -o, -fake-name-template & -q

[matt-royal]

This PR implements the feature discussed in #191. I did my best to add the feature without making invasive changes, but I did have to restructure how flags are parsed. I'm definitely open to feedback on how I can improve the commit or the feature itself. Here are some specific questions I have:

• Is -fake-name-template a good name for the flag?
• Is text/template the right approach here, or would a simple regex, or a prefix + suffix flag be better?
• If text/template works here, is TargetName alright as the field available in the template, or would another name be better. Perhaps just Name?

/cc @joefitzgerald @maxbrunsfeld

[joefitzgerald]

Thanks for the PR @matt-royal 🙏 I will review this weekend!