We have a new, improved string type coming up in AK (OOM aware, no null
state), and while it's going to use UTF-8, the name UTF8String is a
mouthful - so let's free up the String name by renaming the existing
class.
Making the old one have an annoying name will hopefully also help with
quick adoption :^)
This commit adds "Filesystem Events" View to the Profiler. This tab
will present combined information for recorded Filesystem events.
Currently only accumulated count and duration is presented.
Duration amount currently only shows events that took over 1ms,
which means that in most cases 0 is show.