[NEW TOOL]Support WebSocket

[stqf]

What tool do you want?
Support websocket client

Refer to https://wstool.js.org/ , support input header

[sharevb]

Hi @stqf (and @CorentinTh), implemented in #1278 but as far as browser are custom header is not possible (https://stackoverflow.com/questions/4361173/http-headers-in-websockets-client-api)