Sets up a template to prep recording sessions that use itsalive and asciinema.
See this post for details and links.
USAGE: prep-itsalive <command name>
       Generates an .itsalive file that's
       prepped for asciinema recording.
       see https://gitlab.com/stavros/itsalive
       and https://weblog.masukomi.org/2022/10/11/recording_and_sharing_terminal_sessions/
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