modEntry command

[liquidnya]

The !entry command (see #14) could have a modEntry version used by the broadcaster only like this: !entry <username> (similar to how !remove <username> works),
this way level codes can be looked up more easily by the broadcaster without selecting the level or having to read and understand the json save file.
I have already made an implementation for this broadcaster feature, which is currently also already in use, but I have not ported it to this version of the queue yet, but I might create a PR soon.