Adding support to start a huddle from emacs-slack (jumping to the app)

After some researching I found out that starting a Slack huddle (a call within the Slack app) is super easy: just open a link in the browser with room and team id.

So I decided to add the functionality to my fork of emacs-slack.

Now if you are in a slack buffer (you can test it freely, the app will ask you for confirmation before starting/joining a call), you can just do M-x slack-join-huddle.

This along with fixing the threads suddenly closing while I was typing is making emacs-slack a nice experience for me.

Happy slacking!