Also format all files and add a flake.lock for lib
for a folder thats meant to work on other flakes theres never a reason
it should need to refer to itself, only other flakes. So "self" and
"inputs" are better namings for these variables. The userFlake* is
redundant and confusing, when trying to call the functions its hard to
figure out how to use them when there are now two lines of arguments to
figure out.
for clarity's sake, expose which function uses final and prev, so that
people can have a clearer understanding how they relate to each other
in terms of dependencies.
also a simple `{ lib = final; }` probably does not warrant a complete
callLibs obscurization.
