Add more to Celadon University

This adds;
- Text and stuff on the interior to add some really nice worldbuilding
- Trainers outside that you can fight with repeatedly.

The trainers need yes/no menus but I can't figure it out for the life of me. If anyone can do it, lemme know!

text/CeladonUniversityOutside.asm

@@ -0,0 +1,21 @@
+_CeladonUniversityOutsideYesNo::
+	text "I love battles!"
+	cont "Wanna go?"
+	done
+
+_CeladonUniversityRefuse::
+	text "Aww! Next time?"
+	done
+
+_CeladonUniversityOutsideBattleText1::
+	text "Ok! Game on!"
+	done
+
+_CeladonUniversityOutsideEndBattleText1::
+	text "Darn! You"
+	line "beat me again!"
+	prompt
+
+_CeladonUniversityOutsideAfterBattleText1::
+	text "!"
+	done