This adds the Pokemon Centre infrastructure for Nihon and Silent Hills's one.
For all future Nihon Pokemon Centres, they must refer to the 2F one for the warp, and the map blocks for 1Fs should use the Nihon variant.
Kanto will follow suit (eventually). The aim is to make a more immersive region structure.
Required a little tinkering because I'm vain and wanted the door to be accurate. Please understand.
When doing Viridian Forest I had a bit of a moment and kept trying to use the entirely wrong building when it was staring me in the face. I am sorry.
I'm getting an 8-bit error on Mewtwo's object code in Cerulean Cave B1F. Misty may need to check this, I'm just getting these locations put in the overworld.
