Krunner plugin that provides the list of buddies in Pidgin making it possible to start a conversation from Krunner.
download https://github.com/israelrios/plasma-runner-pidgin/raw/master/plasma-runner-pidgin_1.0.0_amd64.deb and install.
or compile from sources:
cmake ../ \
-DCMAKE_INSTALL_PREFIX=`kf5-config --prefix` \
sudo make install
Restart Krunner. Then check this plugin is enabled in Krunner settings. Your pidgin buddies should be searchable on Krunner.