Add Ping Button for Web Sockets

[komape]

One of the control frames for web sockets are ping and pong messages as described in the mdn web docs and in section 5.5.2 and 5.5.3 of RFC 6455. Closing the socket also uses a control frame which is sent if you click on the Disconnect button in Insomnia. Would be great, if there is also a Ping button to check the connection to the server. What do you think of it?

[rishabhgup-adb]

I was thinking of the same and happy to take up the work for enhancing Ping/Pong from websocket. Features I think insomnia needs:

1. Ability to send Ping Frame
2. View Ping/Pong frame received in the Req/Res window