Male Nun tag

BUR #44223 is pending approval.

mass update male_focus nun -*girl* -> male_nun
create implication male_nun -> crossdressing_(mtf)
create implication male_nun -> nun

There's a "Male Maid" and a "Male Playboy Bunny" tag so I think there should be a tag for boys in nun habits as well

was thinking abt making more tags like these actually, wondering if there should be a "male cheerleader" tag too since a lot of crossdressing/otokonoko pics i see involve cheerleaders

I think the idea of a male nun tag is good but there's art like post #8508433 in your mass update that would be misstagged if it was implied to crossdressing (mtf). I don't think it should be implied to that tag for the same reason as male playboy bunny (forum #365648 for reference)