Add subdirectories to engine/ similar to pokecrystal

engine/battle/move_effects/heal.asm

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+HealEffect_:
+	ld a, [H_WHOSETURN]
+	and a
+	ld de, wBattleMonHP
+	ld hl, wBattleMonMaxHP
+	ld a, [wPlayerMoveNum]
+	jr z, .healEffect
+	ld de, wEnemyMonHP
+	ld hl, wEnemyMonMaxHP
+	ld a, [wEnemyMoveNum]
+.healEffect
+	ld b, a
+	ld a, [de]
+	cp [hl] ; most significant bytes comparison is ignored
+	        ; causes the move to miss if max HP is 255 or 511 points higher than the current HP
+	inc de
+	inc hl
+	ld a, [de]
+	sbc [hl]
+	jp z, .failed ; no effect if user's HP is already at its maximum
+	ld a, b
+	cp REST
+	jr nz, .healHP
+	push hl
+	push de
+	push af
+	ld c, 50
+	call DelayFrames
+	ld hl, wBattleMonStatus
+	ld a, [H_WHOSETURN]
+	and a
+	jr z, .restEffect
+	ld hl, wEnemyMonStatus
+.restEffect
+	ld a, [hl]
+	and a
+	ld [hl], 2 ; clear status and set number of turns asleep to 2
+	ld hl, StartedSleepingEffect ; if mon didn't have an status
+	jr z, .printRestText
+	ld hl, FellAsleepBecameHealthyText ; if mon had an status
+.printRestText
+	call PrintText
+	pop af
+	pop de
+	pop hl
+.healHP
+	ld a, [hld]
+	ld [wHPBarMaxHP], a
+	ld c, a
+	ld a, [hl]
+	ld [wHPBarMaxHP+1], a
+	ld b, a
+	jr z, .gotHPAmountToHeal
+; Recover and Softboiled only heal for half the mon's max HP
+	srl b
+	rr c
+.gotHPAmountToHeal
+; update HP
+	ld a, [de]
+	ld [wHPBarOldHP], a
+	add c
+	ld [de], a
+	ld [wHPBarNewHP], a
+	dec de
+	ld a, [de]
+	ld [wHPBarOldHP+1], a
+	adc b
+	ld [de], a
+	ld [wHPBarNewHP+1], a
+	inc hl
+	inc de
+	ld a, [de]
+	dec de
+	sub [hl]
+	dec hl
+	ld a, [de]
+	sbc [hl]
+	jr c, .playAnim
+; copy max HP to current HP if an overflow occurred
+	ld a, [hli]
+	ld [de], a
+	ld [wHPBarNewHP+1], a
+	inc de
+	ld a, [hl]
+	ld [de], a
+	ld [wHPBarNewHP], a
+.playAnim
+	ld hl, PlayCurrentMoveAnimation
+	call BankswitchEtoF
+	ld a, [H_WHOSETURN]
+	and a
+	coord hl, 10, 9
+	ld a, $1
+	jr z, .updateHPBar
+	coord hl, 2, 2
+	xor a
+.updateHPBar
+	ld [wHPBarType], a
+	predef UpdateHPBar2
+	ld hl, DrawHUDsAndHPBars
+	call BankswitchEtoF
+	ld hl, RegainedHealthText
+	jp PrintText
+.failed
+	ld c, 50
+	call DelayFrames
+	ld hl, PrintButItFailedText_
+	jp BankswitchEtoF
+
+StartedSleepingEffect:
+	TX_FAR _StartedSleepingEffect
+	db "@"
+
+FellAsleepBecameHealthyText:
+	TX_FAR _FellAsleepBecameHealthyText
+	db "@"
+
+RegainedHealthText:
+	TX_FAR _RegainedHealthText
+	db "@"