add Polished specific in-game tips

[itsdarsh]

Adds:

• Advanced Tip about hidden abilities in Ecruteak City
  

• Trainer Tip about HMs not needing to be taught to used outside of battle in Ilex Forest, also slightly reworked Cut Master's script to better reflect this (forest tileset doesn't have the Advanced Tip sign, so this matches behavior seen in Viridian Forest). Note that this is where you chase Farfetch'd around, so it's a little out of the way.
  

• Fixes typo in Route 43 Advanced Tip

[itsdarsh]

Did a little re-labeling to match pokecrystal. Should've clarified that, sorry. (They're not super consistent in polished or pokecrystal). Text is as follows:

EcruteakCityAdvancedTips:
	text "Advanced Tips!"

	para "Some #mon you"
	line "encounter may"

	para "have a rare"
	line "ability, also"

	para "known as a"
	line "hidden Ability!"

	para "A hatched #mon"
	line "also has a low"

	para "chance to have"
	line "a hidden Ability."
	done

IlexForestTrainerTips:
	text "Trainer Tips!"

	para "Some moves can"
	line "be used outside"
	cont "of battle!"

	para "These are called"
	line "Hidden Machines,"
	cont "or HMs for short."

	para "As long as a #-"
	line "mon is compatible,"

	para "it can use the"
	line "move outside of"
	cont "battle."

	para "You don't even"
	line "have to teach it"
	cont "the move!"
	done