add live meeting in broadcast screen

app/controllers/public/live_meetings_controller.rb

@@ -0,0 +1,9 @@
+class Public::LiveMeetingsController < Public::BaseController
+  skip_after_action :verify_authorized
+
+  def show
+    broadcast = Broadcast.find_by_token!(params[:broadcast_token])
+    @live_meeting_url = broadcast.project.live_meeting_url
+    render 'public/live_meetings/show'
+  end
+end