Update WebSocket code to generated models

[nielsvanvelzen]

Thanks to the amazing work from @crobibero we can now (with 10.9) use the WebSocket models from the OpenAPI specification. This PR updates our implementation to use those models.

• Delete manually added WebSocket models
• Update WebSocket code to use generated models
• Catch deserialization issues so the connection doesn't stop forwarding messages

Note: subscriptions still need to be manually added to subscriptionTypes.kt, I don't think we can really automate that.

Note2: New models are incompatible with old models because we used different names for some properties. Running the 10.9 spec with a 10.8 server and the other way around mostly works though.

Note3/reminder: Docs still need updating <-- 2024 update: will update documentation later ©️

Draft until 10.9 beta's start rolling out.

[nielsvanvelzen]

Made this a year ago.. Didn't think 10.9 would be this far away at that time.

I didn't test it now but as it is mostly switching from the old manually written models to the auto-generated once it should just work. I have some more changes I'd like to make to the WebSocket implementation anyway which I will do in another PR later.

[Maxr1998]

LGTM