When following the getting started guide commands were failing due to
the mater branch not existing. I went through and updated all
references in the docs and other scripts from master to main.
As mentioned in #370 it would not result in a directory called `bud`, as
can be seen in the custom `get.bash` command where the directory name
defaults to `devos`.
the commmunity branch was fallen too far behind and there where no
contributions to it, anyways. We will start linking usage examples
out in the wild, instead.
* Update the readme to pull from cachix first, so users don't have to
build nix.
* Pull `nixFlakes` from override for slightly newer ui, and consistency
for users who change the nixos flake ref to something newer.
