place the darkvoid.json file to your zed themes folder, generally $XDG_CONFIG/zed/themes.
then you can issue the cmd-k cmd-t keyshort to open the theme switcher and select "Dark Void" or set
# $XDG_CONFIG/zed/settings.json { theme = "Dark Void" }
to your zed settings.json file.
be darky and happy (:
darkvoid is licensed under the MIT License.