Split map scripts, text, events from main.asm

The commit we deserve

maps/Route43MahoganyGate.asm

@@ -0,0 +1,61 @@
+Route43MahoganyGate_MapScriptHeader: ; 0x19ab09
+	; trigger count
+	db 0
+
+	; callback count
+	db 0
+; 0x19ab0b
+
+UnknownScript_0x19ab0b: ; 0x19ab0b
+	faceplayer
+	loadfont
+	checkbit1 $0022
+	iftrue UnknownScript_0x19ab19
+	2writetext UnknownText_0x19ab1f
+	closetext
+	loadmovesprites
+	end
+; 0x19ab19
+
+UnknownScript_0x19ab19: ; 0x19ab19
+	2writetext UnknownText_0x19ab65
+	closetext
+	loadmovesprites
+	end
+; 0x19ab1f
+
+UnknownText_0x19ab1f: ; 0x19ab1f
+	db $0, "Only people headed", $4f
+	db "up to LAKE OF RAGE", $51
+	db "have been through", $4f
+	db "here lately.", $57
+; 0x19ab65
+
+UnknownText_0x19ab65: ; 0x19ab65
+	db $0, "Nobody goes up to", $4f
+	db "LAKE OF RAGE these", $55
+	db "days.", $57
+; 0x19ab91
+
+Route43MahoganyGate_MapEventHeader: ; 0x19ab91
+	; filler
+	db 0, 0
+
+	; warps
+	db 4
+	warp_def $0, $4, 1, GROUP_ROUTE_43, MAP_ROUTE_43
+	warp_def $0, $5, 2, GROUP_ROUTE_43, MAP_ROUTE_43
+	warp_def $7, $4, 5, GROUP_MAHOGANY_TOWN, MAP_MAHOGANY_TOWN
+	warp_def $7, $5, 5, GROUP_MAHOGANY_TOWN, MAP_MAHOGANY_TOWN
+
+	; xy triggers
+	db 0
+
+	; signposts
+	db 0
+
+	; people-events
+	db 1
+	person_event $43, 8, 4, $9, $0, 255, 255, $80, 0, UnknownScript_0x19ab0b, $ffff
+; 0x19abb8
+