conversation: add new loadConversationUntil and SwarmMessageVect type

CMakeLists.txt

bin/dbus/cx.ring.Ring.ConfigurationManager.xml

bin/dbus/dbusconfigurationmanager.hpp

bin/jni/conversation.i

bin/nodejs/conversation.i

configure.ac

meson.build

src/client/conversation_interface.cpp

src/jami/conversation_interface.h

src/jamidht/conversation_module.cpp

src/jamidht/conversation_module.h