Rename "Air" (VN) tag

The bulk update request #13711 has been rejected.

create alias air -> air_(video_game)
remove alias air -> air_(video_game)

Awfully ambiguous tag given the lack of qualifier.

I suggest using the *_(visual_novel) qualifer instead.

I'm much more partial to the visual novel qualifier as per Hillside Moose's suggestion.

The bulk update request #13711 (forum #227797) has been rejected by @Hillside_Moose.

The bulk update request #13735 has been approved by @Hillside_Moose.

create alias air -> air_(visual_novel)
remove alias air -> air_(visual_novel)

Visual novel qualifier.

The bulk update request #13735 (forum #227879) has been approved by @Hillside_Moose.