[bulk] &th dragon series

create implication 7th_dragon -> 7th_dragon_(series)
create implication 7th_dragon_2020 -> 7th_dragon_(series)
create implication 7th_dragon_iii -> 7th_dragon_(series)
create implication 7th_dragon_2020-ii -> 7th_dragon_(series)

Link to request

Same series

I only played the first one, but the characters in the other games are different from the firt game, so it should be better to have a series tag rather than to have an implication to the first game.

The bulk update request #234 has been approved.

I think 7th_dragon_iii links to 7th_dragon instead of 7th_dragon_(series)

The tag implication 7th_dragon -> 7th_dragon_(series) has been approved.

The tag implication 7th_dragon_iii -> 7th_dragon_(series) has been approved.