Move all functions and classes currently available through lib/name and
libName to be under a single flat namespace in lib. This make
reorganising the lib namespace much simpler as the location of symbols
can move without breaking the consumers of lib.
The multi-entrypoint design was already problematic for the web plugin
system which couldn't effectively use it due to how webpack's shared
module system is awkward to set up with multiple entrypoints per package.
Enforce the filename of uploaded mods match {name}_{version}.zip with
name and version taken from the zip file's info.json entry. This allows
it to be used as a unique key for the mod and solves part of the issues
with mods having different number of leading zeros in their version.