[FR]: Respect XDG_CONFIG_HOME

[LeifAndersen]

Right now the xreal config files seem to go directly into the user's home directory. While its not the end of the world, a nicer solution would be to have it follow the $XDG_CONFIG_HOME location), this way, the user can:

1. Have their config files in the place they expect config files to go, and
2. Not add an extra dot file to their home (unless that's what they wanted).

According to the spec https://specifications.freedesktop.org/basedir-spec/latest/ar01s03.html :

$XDG_CONFIG_HOME defines the base directory relative to which user-specific configuration files should be stored. If $XDG_CONFIG_HOME is either not set or empty, a default equal to $HOME/.config should be used.

[wheaney]

I'm going to close this in favor of #4

[LeifAndersen]

Woops, didn't see that one, thanks. :D