pidgin/pidgin

Port the protocol plugins to the purple_conversation_manager_api

Testing Done:
Connected an xmpp and irc account and verified chats and ims worked.

Reviewed at https://reviews.imfreedom.org/r/829/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
subprojects/*/
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?
po\/pidgin\.pot$