Nihon + Silent Hills Groundwork

Currently doesn't build due to a weird error

```
rgbasm -hL -Q8 -P includes.asm -Weverything -Wnumeric-string=2 -Wtruncation=1  -o data/maps/map_data.o data/maps/map_data.asm
error: data/maps/map_data.asm(3) -> data/maps/maps.asm(544) -> macros/asserts.as
m::assert_table_length(14):
    Expected constant expression: 'NUM_SILENT_HILLS_MAP' is not constant at asse
mbly time
error: data/maps/map_data.asm(3) -> data/maps/maps.asm(544) -> macros/asserts.as
m::assert_table_length(16):
    Assertion failed: MapGroup_SilentHills: expected 0 entries, each 9 bytes
error: Assembly aborted (2 errors)!
make: *** [Makefile:119: data/maps/map_data.o] Error 1
```

data/events/engine_flags.asm

@@ -99,6 +99,7 @@ EngineFlags:
 	engine_flag wVisitedSpawns, SPAWN_LAKE_OF_RAGE
 	engine_flag wVisitedSpawns, SPAWN_BLACKTHORN
 	engine_flag wVisitedSpawns, SPAWN_MT_SILVER
+	engine_flag wVisitedSpawns, SPAWN_SILENT_HILLS
 	engine_flag wVisitedSpawns, NUM_SPAWNS ; unused
 
 	engine_flag wLuckyNumberShowFlag, LUCKYNUMBERSHOW_GAME_OVER_F

data/maps/attributes.asm

@@ -695,3 +695,4 @@ ENDM
 	map_attributes Route30BerryHouse, ROUTE_30_BERRY_HOUSE, $00, 0
 	map_attributes MrPokemonsHouse, MR_POKEMONS_HOUSE, $00, 0
 	map_attributes Route31VioletGate, ROUTE_31_VIOLET_GATE, $00, 0
+	map_attributes SilentHills, SILENT_HILLS, $00, 0 ; this is on its own for now. add connections to mt. silver later.

data/maps/blocks.asm

@@ -1045,3 +1045,6 @@ BetaBlank_Blocks: ; unreferenced
 
 GoldenrodDeptStoreRoof_Blocks:
 	INCBIN "maps/GoldenrodDeptStoreRoof.ablk"
+
+SilentHills_Blocks:
+	INCBIN "maps/SilentHills.ablk"

data/maps/flypoints.asm

@@ -27,4 +27,6 @@ Flypoints:
 	db LANDMARK_FUCHSIA_CITY,     SPAWN_FUCHSIA
 	db LANDMARK_CINNABAR_ISLAND,  SPAWN_CINNABAR
 	db LANDMARK_INDIGO_PLATEAU,   SPAWN_INDIGO
+; Nihon
+	db LANDMARK_SILENT_HILLS,	  SPAWN_SILENT_HILLS
 	db -1 ; end

data/maps/landmarks.asm

@@ -104,6 +104,8 @@ Landmarks:
 	landmark  12, 100, TohjoFallsName
 	landmark  20,  68, Route28Name
 	landmark 140, 116, FastShipName
+	assert_table_length NIHON_LANDMARK
+	landmark 100, 116, SilentHillsName
 	assert_table_length NUM_LANDMARKS
 
 NewBarkTownName:     db "NEW BARK¯TOWN@"
@@ -208,3 +210,4 @@ TohjoFallsName:      db "TOHJO FALLS@"
 UndergroundName:     db "UNDERGROUND@"
 BattleTowerName:     db "BATTLE¯TOWER@"
 SpecialMapName:      db "SPECIAL@"
+SilentHillsName:	 db "SILENT HILLS@"

data/maps/maps.asm

@@ -43,6 +43,7 @@ MapGroupPointers::
 	dw MapGroup_NewBark     ; 24
 	dw MapGroup_Saffron     ; 25
 	dw MapGroup_Cherrygrove ; 26
+	dw MapGroup_SilentHills ; 27
 	assert_table_length NUM_MAP_GROUPS
 
 MapGroup_Olivine:
@@ -536,3 +537,8 @@ MapGroup_Cherrygrove:
 	map MrPokemonsHouse, TILESET_FACILITY, INDOOR, LANDMARK_ROUTE_30, MUSIC_CHERRYGROVE_CITY, FALSE, PALETTE_DAY, FISHGROUP_SHORE
 	map Route31VioletGate, TILESET_GATE, GATE, LANDMARK_ROUTE_31, MUSIC_ROUTE_30, FALSE, PALETTE_DAY, FISHGROUP_SHORE
 	assert_table_length NUM_CHERRYGROVE_MAPS
+
+MapGroup_SilentHills:
+	table_width MAP_LENGTH, MapGroup_SilentHills
+	map SilentHills, TILESET_JOHTO, TOWN, LANDMARK_SILENT_HILLS, MUSIC_NEW_BARK_TOWN, TRUE, PALETTE_AUTO, FISHGROUP_SHORE
+	assert_table_length NUM_SILENT_HILLS_MAP

data/maps/outdoor_sprites.asm

@@ -30,6 +30,7 @@ OutdoorSprites:
 	dw NewBarkGroupSprites
 	dw SaffronGroupSprites
 	dw CherrygroveGroupSprites
+	dw SilentHillsGroupSprites
 	assert_table_length NUM_MAP_GROUPS
 
 PalletGroupSprites:
@@ -307,6 +308,7 @@ IndigoGroupSprites:
 	db SPRITE_POKE_BALL
 	db SPRITE_BOULDER
 
+SilentHillsGroupSprites: ; Will have its own thing eventually
 NewBarkGroupSprites:
 	db SPRITE_SUICUNE
 	db SPRITE_SILVER_TROPHY

data/maps/roofs.asm

@@ -38,6 +38,7 @@ MapGroupRoofs:
 	db ROOF_NEW_BARK  ; 24 (New Bark)
 	db -1             ; 25
 	db ROOF_NEW_BARK  ; 26 (Cherrygrove)
+	db ROOF_NEW_BARK  ; 27 (Silent Hills)
 	assert_table_length NUM_MAP_GROUPS + 1
 
 Roofs:

data/maps/scripts.asm

@@ -484,3 +484,4 @@ SECTION "Map Scripts 25", ROMX
 
 INCLUDE "maps/SilverCaveOutside.asm"
 INCLUDE "maps/Route10North.asm"
+INCLUDE "maps/SilentHills.asm"

data/maps/sgb_roof_pal_inds.asm

@@ -30,4 +30,5 @@ MapGroupRoofSGBPalInds:
 	db PREDEFPAL_NEW_BARK
 	db PREDEFPAL_SAFFRON
 	db PREDEFPAL_CHERRYGROVE
+	db PREDEFPAL_SILENT_HILLS
 	assert_table_length NUM_MAP_GROUPS + 1

data/maps/spawn_points.asm

@@ -38,7 +38,9 @@ SpawnPoints:
 	spawn BLACKTHORN_CITY,            21, 30
 	spawn SILVER_CAVE_OUTSIDE,        23, 20
 	spawn FAST_SHIP_CABINS_SW_SSW_NW,  6,  2
-
+	
+	spawn SILENT_HILLS,				  10, 10
+	
 	spawn N_A,                        -1, -1
 
 	assert_table_length NUM_SPAWNS + 1