basically, i have a `c` alias which is `git commit`,
this would resolve to `git commit` literally to try
and complete `commit`, which wouldnt match.
this fixes that, and instead itll suggest commands
that start with `c`. if there is a space after and
completion is requested, itll use the alias properly
prelude is no longer. it is now nature.
organized the single file prelude into multiple
source files and renamed it to nature. this is coming
after thought that it can turn into a general hilbish
lua core, with user facing modules as well.
this introduces the `nature.dirs` module, to interact
and get recently changed to directories and last/old
cwd.