Use home-manager to create xsession.
Readme contains info on how to start xsession on login.
That way home-manager can maintain languages, keyboard and further stuff
globally for user.
No more need to set stuff as workaround within i3 or zsh.
Also enabled to start systemd units after login, as home-manager will
create and trigger `hm-graphical-session.target`.
This was missing after migrating to i3 via nix.
i3blocks was installed via apt before.
home-manager doesn't provide options, I keep my old file. It is updated
for the used version.
Install and configure i3 via nix home-manager.
This commit just migrates existing configuration.
It doesn't clean things up, e.g. move stuff to expected locations.
I configure x* tools from within i3 right now …
Also didn't clean things up, e.g. sort and group related things.
Daniel Siepmann