Review WebSockets command and control channel

The WebSockets command and control channel was added more than 10 years ago. Very little maintenance has been performed. There is significant room for improvement and many bugs. It is effectively unusable in its current state.

• #2768
• #1570
• #2147

There are also many TODOs:

https://github.com/beefproject/beef/blob/eb5959a9756fb9ac84467272721bd0b390896a1e/core/main/network_stack/websocket/websocket.rb#L124-L133

https://github.com/beefproject/beef/blob/eb5959a9756fb9ac84467272721bd0b390896a1e/core/main/network_stack/websocket/websocket.rb#L152-L158

https://github.com/beefproject/beef/blob/eb5959a9756fb9ac84467272721bd0b390896a1e/core/main/client/websocket.js#L81-L97