Recent Weblate version dropped the use of script in favour of addons. There is a complete documentation on how to use existing addons, how to create a new addons (https://docs.weblate.org/en/latest/admin/addons.html?highlight=addon), however I have no idea how to add my addons and have it present in the web interface.
How does one add a new addons and have it available in the web interface?
As you have also reported it as an issue, the documentation got updated mean while to cover this.