Support --cookie-file in httpx[cli]

[cryptrr]

This is very important for automation use cases.

So imagine I want to send a POST request to an authenticated endpoint. I need to include a certain cookie with an ACCESS_TOKEN

You can do it manually but that ACCESS_TOKEN will expire and need to be updated again after fetching it again from the browser.

With a netscape style cookie file passed in as --cookie-file , the httpx library can update the new cookies received from every request and the cookie file acts as a cookie jar.

This feature works great in yt-dlp and the login cookies passed in never expires because it is being updated by yt-dlp.