Respect XDG_CONFIG_HOME on MacOS

[cideM]

Is your feature request related to a problem? Please describe.
This is about the only CLI utility I use which doesn't respect XDG_CONFIG_HOME on MacOS.

Describe the solution you'd like
According to the PR which added config location #150 it uses https://github.com/shibukawa/configdir which simply doesn't take that variable into account.

[mjarkk]

But isn't XDG_CONFIG_HOME is Linux thing?
Ya sure you can add those shell variables to MacOS but that doesn't mean we will support them, if that would be so we would also need to support XDG_CONFIG_HOME on Windows.

I also think that this issue has more to do with shibukawa/configdir than with lazygit.
If you really think this is something important to have on MacOS i would recommend to pass trough the issue to their repo because in that case other programs can also make use of this.

[cideM]

Hm good point I'll create the issue in the other repo