webhook support

[OCOtheOmega]

Hi, I built webhook support mostly for my own use.
Then I saw people asking for configurable webhook settings, so I decided to share my version.

This may differ from how you would implement it, especially on the UI side.
I am not insisting this should be merged as is.
If you want, you can use this PR as a base and rework anything you prefer.
If it already looks acceptable to you, that is great too.

I should be honest, I do not really want to keep working on the UI part, your UI setup is quite complex for me.

[AlexWalp]

Nice! Thanks for your contribution!
Sorry for the GUI code, it's a huge mess. I am rewriting the whole project right now and will eventually rewrite that part as well. I plan to overwrite the whole branch with new code, so it's better to keep the webhook separate from the legacy code for now.

[AlexWalp]

If you don't mind, you can merge with the new code once it's finished and I can make a proper GUI tab for it

[roundsssstrue]

you are a life savior dude ! this looks amazing!
(i think it was me who asked haha)

[OCOtheOmega]

If you don't mind, you can merge with the new code once it's finished and I can make a proper GUI tab for it

its actually done, mb i do smth but it look fine rn for using, you can remove all part with ui. Also test how it work.