Gym Leader Rematches!

This commit adds a large fundamental change to KEP, that being Gym Rematches.

This is achieved alongside a rework to the script that makes those post-game-gating NPCs shift around. If you add a new one, just add its constant to the lists you'll see in the Hall of Fame script.

It also fixes a few bugs:
- Fixed a bug where Cinnabar Gym loaded a fleet of Blaines. This occurred due to the way he is coded at base, and a misunderstanding I had when implementing his scaling. This is now fixed by standardising his gym script instead, while letting the gym trainers still use the old one.
- Fixed a bug where the Up-Grade NPC would not appear after beating Silph Co. 11F. However, Giovanni currently seems to have trouble with his text. This floor needs some re-coding anyway, given we need to add Jessie and James to it.

And some misc. changes:
- Changed the first Moon Stone in Mt. Moon to a Poison Stone for the Nidoking speedrunners
- Debug Mode now has a line of code to set up the post-game easily
- Changed Surge's initial battle text to Yellow's
- Added Sabrina's more accurate LGPE initial battle text, referring to the spoon she bent by accident

text/CinnabarGym.asm

@@ -208,5 +208,40 @@ _CinnabarGymGuidePreBattleText::
 
 _CinnabarGymGuidePostBattleText::
 	text "<PLAYER>! You beat"
-	line "that fire brand!"
+	line "that firebrand!"
 	done
+
+_BlaineRematchPreBattleText::
+	text "Hah! Well done"
+	line "returning here!"
+	
+	para "You're the one"
+	line "who retrieved the"
+	cont "key from #MON"
+	cont "MANSION!"
+	
+	para "Did you see"
+	line "anything while"
+	cont "you were in"
+	cont "there?"
+	
+	para "That place holds"
+	line "remnants of my"
+	cont "old friend's re-"
+	cont "search!"
+	
+	para "Hmm..."
+	
+	para "Well, it's not"
+	line "as though I know"
+	cont "the full story."
+	
+	para "Since you're here"
+	line "though, let's"
+	cont "battle!"
+	done
+
+_BlaineRematchDefeatedText::
+	text "Hah!"
+	line "I'm all fired up!"
+	prompt