This commit makes windows errors store the code instead of being a
formatted string literal. This will allow comparing against the error,
and checking what it is. The formatting is now done in the formatter,
and moved to an implementation file to avoid polluting headers with
windows.h. The kind of the error is now determined by an enum Kind which
will allow matching against the error kind.
Co-Authored-By: Andrew Kaster <andrew@ladybird.org>
This new method is meant to be used in both userspace and kernel code.
The idea is to allow printing of a verbose message and then returning an
errno code which is the proper mechanism for kernel code because we
should almost always assume that such error will be propagated back to
userspace in some way, so the userspace code could reasonably decode it.
For userspace code however, this new method is meant to be a simple
wrapper for Error::from_string_view, because for most invocations, it's
much more useful to have a verbose & literal error than a errno code, so
we simply ignore that errno code completely in such context.
