Use standard config paths instead of home root

[Sarke]

Using a standard config path, instead of populating the $HOME root with dot files, is a nicer approach (relevant).

[CLAassistant]

All committers have signed the CLA.

[eldios]

yes! THIS please 🙏🏻 🙏🏻 🙏🏻

@Sarke can you resolve conflicts? this is a quick and easy change that would make for a much better experience and cleaner setup.

Then I think the docs should have a way for people to 'migrate' from the old home-littering approach to the new one using $XDG_CONFIG_HOME by default.

[leprechaun]

Updated XDG link: https://specifications.freedesktop.org/basedir-spec/latest/#variables