Move all code out of home.asm into home/

This results in 64 home/*.asm files, comparable to pokecrystal's 57.

home/item.asm

@@ -0,0 +1,49 @@
+; uses an item
+; UseItem is used with dummy items to perform certain other functions as well
+; INPUT:
+; [wcf91] = item ID
+; OUTPUT:
+; [wActionResultOrTookBattleTurn] = success
+; 00: unsuccessful
+; 01: successful
+; 02: not able to be used right now, no extra menu displayed (only certain items use this)
+UseItem::
+	farjp UseItem_
+
+; confirms the item toss and then tosses the item
+; INPUT:
+; hl = address of inventory (either wNumBagItems or wNumBoxItems)
+; [wcf91] = item ID
+; [wWhichPokemon] = index of item within inventory
+; [wItemQuantity] = quantity to toss
+; OUTPUT:
+; clears carry flag if the item is tossed, sets carry flag if not
+TossItem::
+	ldh a, [hLoadedROMBank]
+	push af
+	ld a, BANK(TossItem_)
+	ldh [hLoadedROMBank], a
+	ld [MBC1RomBank], a
+	call TossItem_
+	pop de
+	ld a, d
+	ldh [hLoadedROMBank], a
+	ld [MBC1RomBank], a
+	ret
+
+; checks if an item is a key item
+; INPUT:
+; [wcf91] = item ID
+; OUTPUT:
+; [wIsKeyItem] = result
+; 00: item is not key item
+; 01: item is key item
+IsKeyItem::
+	push hl
+	push de
+	push bc
+	farcall IsKeyItem_
+	pop bc
+	pop de
+	pop hl
+	ret