server: change ws ping API (#1248)
* feat(server): make it possible to disable WS ping * cleanup * refactor PingConfig * refactor PingConfig * fix build * Update server/src/server.rs * Update server/src/transport/ws.rs * Update server/src/server.rs
* feat(server): make it possible to disable WS ping * cleanup * refactor PingConfig * refactor PingConfig * fix build * Update server/src/server.rs * Update server/src/transport/ws.rs * Update server/src/server.rs