Nothing really. It's just pseudonym.
No, that's just ChatGPT. This might as well be the only thing it's useful for.
You can do so on the github repo associated with this site.
Depends on the reason? In case you have a problem or wish about one of my projects, I would prefer to get it on the issue tracker of said project. If that's not possible and or don't find anywhere else where it fits, you can write an email to contact@derdilla.com