qulogic/pidgin

Add a cancellable property to PurpleConnection and port IRCv3 to it

As more and more of our protocols start using Gio, it just makes sense to have
a cancellable ready for them.

Testing Done:
Connected, disconnected, and reconnected and IRCv3 account without issue.

Reviewed at https://reviews.imfreedom.org/r/2864/
[wrap-file]
directory = gi-docgen-2023.1
source_url = https://download.gnome.org/sources/gi-docgen/2023/gi-docgen-2023.1.tar.xz
source_filename = gi-docgen-2023.1.tar.xz
source_hash = a9a687c1b7c4a4139a214bd451e01ca86131a3161f68aa3e07325b06002bbfb6