Corvus Mine Restored

[Rias]

The Corvus mine has been restored, along with its access points! One of said access points has been updated to be more well-hidden again, as it wasn't supposed to be an "obvious exit" but ended up that way due to the conversion to the new codebase.

Within the mine is some mine-able schist that has chances to contain copper and a few gems/valuables, and some cart tracks with minecarts. The area still needs a bit of a touch-up regarding some of the room descriptions and mobs (including adding some more guards), so consider that an effort that is still ongoing at this point.

The Coalition hub within the mine is closed until it gets its own touch-up.