chore(lint): add satandardrb linter/formatter

[cassidycodes]

• add standardrb
• run standardrb --fix
• add rubocop config so that rubocop uses standardrb
• add standardrb ci job

[rperryng]

I actually like single quotes 😢 😆

that said, I went out in search for answers, read https://anti-pattern.com/always-use-double-quoted-strings-in-ruby, and found it convincing enough to prefer double quotes in general - in particular, knowing that there is no performance penalty associated with trying to interpolate the strings.