New channel: confusion in subcommand names

Dependencies

• [2] TFK7CYFQ `pijul channel new` to create new, empty channels
• [3] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).
• [4] VQPAUKBQ channel switch as an alias to reset

Change contents

• replacement in pijul/src/commands/channel.rs at line 33
  [2.37]→[2.37:66](∅→∅)
  − #[clap(name = "switch")]
  [2.37]

  [2.66]
  + #[clap(name = "new")]