Haunted House groundwork

Adds the Haunted House with wild data, warps, and most of the house itself done.

Gengar Doll is set to be a boss fight, needs walking sprites among other things.

BG events need a bit more fleshing out.

Needs integration for the loose board mechanic.

Otherwise extremely fleshed-out.

maps/HauntedHouseFoyer.asm

@@ -0,0 +1,58 @@
+; This is based on the unused Haunted House landmark from GSC's source code.
+; Nothing is known about it except for the dummied-out name.
+; Given the time frame, my idea is it may have been derived from the PC-98 Corpse Party game, which is time-appropriate and was very popular with game junkies.
+; Given Game Freak ran game magazines and was basically run by nerds, I imagine they'd have heard of and/or played it. The Game Boy can easily replicate much of the graphics.
+; It's not just Heavenly Host, though! It's very different! But expect some cool features a la it. Like, say...the loose boards!
+
+; A lot of inspiration is also taken from the Old Chateau, given GSC has a deep connection with DP.
+
+	object_const_def
+
+HauntedHouseFoyer_MapScripts:
+	def_scene_scripts
+
+	def_callbacks
+
+HauntedHouseFoyerTornPosterScript:
+	jumptext HauntedHouseFoyerTornPosterText
+
+HauntedHouseFoyerTornPosterText:
+	text "Comment to be"
+	line "written."
+	done
+
+HauntedHouseFoyerIntactPosterScript:
+	jumptext HauntedHouseFoyerIntactPosterText
+
+HauntedHouseFoyerIntactPosterText:
+	text "Comment to be"
+	line "written."
+	done
+
+HauntedHouseFoyerOldBooks:
+	jumpstd OldBooksScript
+
+HauntedHouseFoyerOldMagazines:
+	jumpstd OldMagazinesScript
+
+HauntedHouseFoyer_MapEvents:
+	db 0, 0 ; filler
+
+	def_warp_events
+	warp_event  5,  9, ROUTE_45, 1
+	warp_event  6,  9, ROUTE_45, 2
+	warp_event  5,  4, HAUNTED_HOUSE_1F, 13
+	warp_event  6,  4, HAUNTED_HOUSE_1F, 14
+	warp_event  3,  1, HAUNTED_HOUSE_2F, 2
+	warp_event  8,  1, HAUNTED_HOUSE_2F, 4
+
+	def_coord_events
+
+	def_bg_events
+	bg_event  4,  1, BGEVENT_READ, HauntedHouseFoyerTornPosterScript
+	bg_event  7,  1, BGEVENT_READ, HauntedHouseFoyerIntactPosterScript
+	bg_event 11,  4, BGEVENT_READ, HauntedHouseFoyerOldBooks
+	bg_event  0,  4, BGEVENT_READ, HauntedHouseFoyerOldBooks
+	bg_event  1,  4, BGEVENT_READ, HauntedHouseFoyerOldMagazines
+
+	def_object_events