Port to ClientWebSocket

[elijahr2411]

This removes the tech debt that is WebSocketSharp

• Fully port everything over to System.Net.WebSockets.ClientWebSocket
• To do this, I've created a new wrapper WebSocket class in WebSocket.cs to wrap a message loop and such. It's mostly compatible with WebSocketSharp.WebSocket aside from some changes I made
• In my testing the VM seems much faster than with wssharp
• Removes the WebSocketSharp reference

However, there are some trade-offs you'll want to consider before merging

• Windows 7 is no longer supported as ClientWebSocket does not support it (However, I seriously hope nobody is still using Windows 7 in 2024)
• DEFLATE compression is also not supported. However, this is also considered a security vulnerability when using SSL so I'm not sure how much of a loss that actually is

[yellows111]

Windows 7 was already a bit of a hack to get working anyway, with it's limited support of TLS 1.2.

Kind of wish someone told me about that Deflate thing. Oops.

Only thing missing would be modifying the action to not do the whole "download WS# thing", could also migrate the project to a later version but that's a me thing, otherwise it's fine.