Imply Da Capo IV and V to main copytag

BUR #38009 has been approved by @evazion.

create implication da_capo_iv -> da_capo
create implication da_capo_v -> da_capo

Part of the main franchise.

I also noticed low-count subtags for some of the numbered entries. Not sure whether we should imply or alias them to their respective games.

The bulk update request #38009 (forum #339335) has been approved by @evazion.

I also noticed low-count subtags for some of the numbered entries. Not sure whether we should imply or alias them to their respective games.

Judging by forum #89665 most of them should just be merged into the mainline titles.