Add some image-related attributes to Attachment
Add some image-related attributes to Attachment

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