Not really a 'pause' key but http://www.thebuddyforum.com/honorbuddy-forum/plugins/uncataloged/64848-hb-toggle-plugin-toggles-hb-off-press-keybind.html
IDK dude. Im sure its a safe plugin but I couldn't play comfortably knowing that my WOW UI has control over my BOT through the game like that. But thats just my opinion.
Your keyboard has control over stop start, it has nothing to do with your wow ui, and anyways the bot is controlling your character anyways