The plugin hasn't been merged to the geany-plugins repository yet so there are no nightlies.
That said, you could try the artifact of the pull request. At the bottom of the page here
https://github.com/geany/geany-plugins/actions/runs/12050135179
you can find the installer with the plugin.
In fact, I'm super-curious how/if it runs under Windows - nobody had the courage to try it yet ;-). Please let me know how it goes.