main: Add cpulimit to precommands

Closes #897

highlighters/main/main-highlighter.zsh

@@ -371,6 +371,7 @@ _zsh_highlight_highlighter_main_paint()
     'chronic' :ev # moreutils 0.62-1
     'ifne' :n # moreutils 0.62-1
     'grc' :se # grc - a "generic colouriser" (that's their spelling, not mine)
+    'cpulimit' elp:ivz # cpulimit 0.2
   )
   # Commands that would need to skip one positional argument:
   #    flock