Citadel Series Tagging

BUR #41192 has been rejected.

rename the_citadel -> the_citadel_(series)
create implication the_citadel -> the_citadel_(series)

Separating the tag for the game (First installment of the series) and the series it's self. Tell me if I did this BUR wrong.

BUR #41193 has been rejected.

create implication the_citadel -> the_citadel_(series)
remove implication beyond_citadel -> the_citadel

Alternative option (shouldn't be hard to manually update the Beyond art)

Only a game and its sequel, no point turning this into an umbrella tag.

The bulk update request #41192 (forum #356017) has been rejected by @nonamethanks.

The bulk update request #41193 (forum #356018) has been rejected by @nonamethanks.