Use a better websocket implementation that is more robust and supports H2 & H3

[fortuna]

H2 and H3 will allow for multiplexing and better performance.

Options:

• https://pkg.go.dev/nhooyr.io/websocket
• https://pkg.go.dev/github.com/gorilla/websocket

We are using https://pkg.go.dev/golang.org/x/net/websocket, which has limitations and is not well-maintained.