nixos/tools: add enable options to manual

E.g. when overriding `nix` with `pkgs.lix`, `nixos-option` will fail.
Given that I haven't used it in a very long time, I wanted to disable
it, but finding an option to turn off `nixos-option` is kinda hard given
that the options are generated here using `mkToolModule`.

I assumed that this isn't possible until I learned that
`system.tools.X.enable` exists. To me, this is a clear sign that these
shouldn't be internal.

0 files changed, 0 insertions, 0 deletions