Add shorthand handler adder for PlayingEvent
Add shorthand handler adder for PlayingEvent

meew0/discordrb,sarsntony/discordrb,Roughsketch/discordrb,megumisonoda/discordrb,sarsntony/discordrb,Roughsketch/discordrb,meew0/discordrb,megumisonoda/discordrb,VxJasonxV/discordrb,VxJasonxV/discordrb