Mt Moon Square House

This adds the Mt Moon Square House, faithfully recreated from GSC. I haven't yet sorted out the important details regarding the Crater Guard and such, though.

Making the map involved making a new desk tile and making house tile $36 be considered a counter tile. Hopefully there aren't any adverse consequences but I've never seen anything of that nature.

I noticed there are a ton of Clefairy text bits, so I refactored it to be a single line farcalled from `text_7.asm`. This also involved an interesting thing with the Pokemon Fan Club where the Pikachu fan has a Clefairy, so I fixed that too.

I figured that adding the dance was a little difficult right now, so we have Clefairys walking around instead.

I haven't figured out a good place to add the ladders yet (since there should be two entrances) but we'll figure that out eventually. It's plausible that we just make the Crater the southern warp, but I like how out-of-the-way the current one is.

Oh, and I fixed the Crater warps.

Overall, functional, but not finished.

data/wild/grass_water.asm

@@ -252,6 +252,7 @@ WildDataPointers:
 	dw NothingWildMons
 	dw NothingWildMons ; battle tent
 	dw NothingWildMons ; mt moon square
+	dw NothingWildMons
 	assert_table_length NUM_MAPS
 	dw -1 ; end