[NEW FEATURE] Add support to read config.toml from xdg_config on macos as well

[DanWlker]

Is your feature request related to a problem? Please describe.
On Macos, oxker defaults to look for config in /application support, but I use tools like stow to manage dotfiles, it is possible to add support for $XDG_CONFIG_HOME as well so they can be stored in the same path?

Describe the solution you'd like
Default to application support, but if its empty, look inside $XDG_CONFIG_HOME

Describe alternatives you've considered

Additional context
Add any other context or screenshots about the feature request here.

[mrjackwills]

I'm not a MacOS user, so would you be able to test a dev build? I can upload one in this issue thread.

The $XDG_CONFIG_HOME value will be set in MacOs environment variables? If not, how is the correct value determined?

[DanWlker]

$XDG_CONFIG_HOME is not set on macos by default, but it should operate same as linux i guess? falling back to $HOME/.config

[mrjackwills]

I'm using the directories crate to get the default folder locations.

They have a table of base dirs, which shows that they use $HOME/Library/Application Support for a lot of locations. I'm not a MacOS user, so I don't know what the preferred location or setup should be.