Add pijul-change

Dependencies

• [2] P37JFWNE Add basic completions (working)
• [3] APJU3BKK Add basic commands

Change contents

• replacement in pijul.fish at line 8
  [2.344]→[2.344:426](∅→∅)
  − # complete -f -c pijul -n "not __fish_seen_subcommand_from $commands" -a "change"
  [2.344]

  [2.426]
  + complete -f -c pijul -n "not __fish_seen_subcommand_from $commands" -a "change" -d "Shows information about a particular change"