!stalk name or !stalk x name to get the last (1 or x) message(s) by name

as of writing this prototype depends on overruslelogs.net so consider it simply a proof of concept

if i had some other endpoint that had chat logs for each user in line format, that would work too.

we could also cache every message locally, but that might get unweildy, maybe we need some kind of database? @sztanpet what do you think?
also, the timestamp is the longest possible timestamp, you also do not know the timezone it will be in, so I would rather opt for simply saying how long ago it was and only on the first line too

every other line would have a `[+10sec]` prefix or something, to make the other lines relative to the first line maybe?