Allow direct query of continent locked/unlocked status

[fredkilbourn]

Right now, one can only directly check continent lock/unlock status by checking ownership of all 3 warpgates on that respective continent. Unfortunately, this isn't even guaranteed in the cases of DBG staff manually locking or unlocking continents or doing zone restarts; the continents can reach a state where they are locked in-game but warpgate ownership is not consistent. You can sometimes track this via streaming API events but that isn't always simple or 100% either.

I propose a world_zone collection (or something similar) which you can lookup world + zone ids and see information like:

• If the continent is currently locked or unlocked
• If locked, who owns it