Add subdirectories to data/ similar to pokecrystal

Top level text/ is now solely for the former text/maps/ files, and other files are in their respective subdirectories in data/.

text/FuchsiaGym.asm

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+_KogaBeforeBattleText::
+	text "KOGA: Fwahahaha!"
+
+	para "A mere child like"
+	line "you dares to"
+	cont "challenge me?"
+
+	para "Very well, I"
+	line "shall show you"
+	cont "true terror as a"
+	cont "ninja master!"
+
+	para "You shall feel"
+	line "the despair of"
+	cont "poison and sleep"
+	cont "techniques!"
+	done
+
+_KogaAfterBattleText::
+	text "Humph!"
+	line "You have proven"
+	cont "your worth!"
+
+	para "Here! Take the"
+	line "SOULBADGE!"
+	prompt