[FR] CustomAlias enchancement

[GrimPod]

Description of issue or feature request:

Would be cool after using perm:!
if there was another variable that we could add that if the perm check failed, then the next lines with that variable at the start would run
the # could even be extended to do this too

EG -
Command = /slap
Config:
perm:cmi.command.slap#%! (using % as the new variable in this example)
%cmi msg [playerName] You missed and slapped yourself
%fromConsole! cmi launch [playerName]
fromConsole! cmi launch $1- p:1

In this example if you had the permission node, then you would slap the selected user,
and if you didnt then then lines with % would then be run telling them you missed and slapped yourself, and launching them

Cmi Version (using/cmi version): 7.7.2.0
Server Type (Spigot/Paperspigot/etc): spigot
Server Version (using /ver): 1.12.2