Including separate zips for each version in the github releases will make it easier to download/update the mod without Overwolf/Curseforge. Can be automated with github actions and the BigWigs releaser.

So this will list a zip for each version under "Assets" for the release?

Yep, something like this format would be great so that all variants can easily be fetched from the release tagged latest:

ItemTooltipProfessionIcons-bcc.zip
ItemTooltipProfessionIcons-classic.zip
ItemTooltipProfessionIcons-retail.zip

Maybe you can add this to your .pkgmeta?
manual-changelog:
filename: /dev/null

Nevermind, this definitely will not work.

I tried defining a manual changelog and adding it to ignore: within the .pkgmeta which causes the packager to generate a changelog file.

The separate zips are now available.

I just learnt how to setup & customise workflows/actions, this is really helpful at structuring the files, wish I knew about this before I created a separate repository for the retail version.
Do you know if its possible to prevent the packager from adding a change log file to the zips?

Thanks for implementing this!