Option handling for LuaLaTeX packages
This package has been extracted from
lyluatex where it was originally
developed as supporting functionality. However, as it turned out it is useful
as a building block for LuaLaTeX packages in general, and the development of
luaformatters made it
clear that the option handling code had to be moved to a standalone package.
Initially there is no extensive documentation available since the package wasn't
originally intended to be exposed to third-party packages or even end-users;
the best sources of documentation are lyluatex and luaformatters codes,
and the docstrings of luaoptions.lua and luaoptions-lib.lua.