OId City

This implements Old City, the Honey Grandma's House, and its Pokecenter+Mart. Bunch of other bits and pieces not added yet, need to figure out the lore for them.

Honey Grandma is designed to make it easier to get important Pokemon, rather than give access to anything new. Thus, she's Nihon-locked by being an Old City resident. Martha's Perfect Rod will follow this trend.

Gold Berry tree exists to make them renewable in-game, I think this is very important.

The flypoint seems bugged.

data/items/fruit_trees.asm

@@ -31,4 +31,5 @@ FruitTreeItems:
 	db ICE_BERRY    ; PEWTER_CITY_1
 	db MINT_BERRY   ; PEWTER_CITY_2
 	db BURNT_BERRY  ; FUCHSIA_CITY
+	db GOLD_BERRY	; OLD_CITY - now there's a farming spot!
 	assert_table_length NUM_FRUIT_TREES

data/items/marts.asm

@@ -36,6 +36,7 @@ Marts:
 	dw MartIndigoPlateau
 	dw MartUnderground
 	dw MartLakeOfRage
+	dw MartOldCity
 	assert_table_length NUM_MARTS
 
 MartCherrygrove:
@@ -421,3 +422,16 @@ MartLakeOfRage:
 	db DUSK_STONE
 	db SHINY_STONE
 	db -1 ; end
+
+MartOldCity:
+	db 9 ; # items
+	db ULTRA_BALL
+	db HYPER_POTION
+	db FULL_HEAL
+	db REVIVE
+	db ANTIDOTE
+	db PARLYZ_HEAL
+	db AWAKENING
+	db MAX_REPEL
+	db PORTRAITMAIL
+	db -1 ; end