The @namespace is something unique to you. It should be the URL of the public repo of your script so that your namespace doesn't enter in conflict with someone else's namespace.

If you want people to contribute to your script or share your script in a better display, GitHub or GitLab are great places to do so. For example, I published a filterlist here. This allows other developers to create issue in a more user-friendly interface and to bring together the contribution of many people, if someone wants to help.

GitLab also have a lot of useful features that are not related to your script but can be very useful for public projects such as this script.

I think that writing the script in English would help popularize the script (if that's your intention). It will also enable random developers to help you improve the script.