No Cookies/Proxy for Websocket requests

Hello, recently tried out Yaak and have really been enjoying it — thanks for your hard work! I do a lot of work with Websockets but found it frustrating that (1) there is no proxy support for WS upgrades and (2) it seems like relevant cookies aren’t being sent over in the Upgrade leg.

I briefly checked out src-tauri/yaak-ws/src/commands.rs > send (ws-send) vs src-tauri/src/http_request.rs > send_http_request (http-send) and it appears as if the cookie-jar is completely absent from the ws handling.

The cookie stuff is a really important feature for me, so would love to see this change!