This is the module that takes care of configuring impermanence at the
system level.
WIP:
* address FIXMEs
* activate home-manager persistence?
* set `programs.fuse.userAllowOther = true;` ?
* point `age` to persisted paths [1] ?
* make sure all services and modules are persisted correctly...
[1]: b1d18d25b8
My profiles are actually just "special" NixOS modules in that they
orchestrate settings that usually span the NixOS/home-manager boundary,
or otherwise set up configurations from multiple modules at once.
Let's consolidate all modules under one path, so that NixOS,
home-manager, and nix-darwin (if I ever end up using it down the line)
would go under the same folder.
