Previously, we would only resolve libraries from `/usr/lib`, which is
not the only path from which the crashed process could've loaded the
libraries from.
The previous solution of "lol whats a UB" was not nice and tripped over
itself when it was run under UBSAN, fix this by doing explicit
byte-by-byte reads where needed.
Apologies for the enormous commit, but I don't see a way to split this
up nicely. In the vast majority of cases it's a simple change. A few
extra places can use TRY instead of manual error checking though. :^)
Also add slightly richer parse errors now that we can include a string
literal with returned errors.
This will allow us to use TRY() when working with JSON data.
`object_name()` already returns the cleaned library name, and we
currently don't have any libraries with suffixes in /usr/lib, so we can
convert this to an `ends_with()` check.
