Organize the engine/ directory, take 3

Renamed `title` to `movies`.
Moved some functions from `engine/routines/` to their fitting
directories, and cleaned up the base `engine/` directory.
Moved `engine/pokemon/tmhm.asm` back to `engine/items/`.

Made a new subdirectory:
* engine/tilesets: Contains all map-related graphics routines.

engine/movie/init_hof_credits.asm

@@ -0,0 +1,79 @@
+InitDisplayForHallOfFame: ; 4e881
+	call ClearBGPalettes
+	call ClearTileMap
+	call ClearSprites
+	call DisableLCD
+	call LoadStandardFont
+	call LoadFontsBattleExtra
+	hlbgcoord 0, 0
+	ld bc, vBGMap1 - vBGMap0
+	ld a, " "
+	call ByteFill
+	hlcoord 0, 0, wAttrMap
+	ld bc, SCREEN_WIDTH * SCREEN_HEIGHT
+	xor a
+	call ByteFill
+	xor a
+	ld [hSCY], a
+	ld [hSCX], a
+	call EnableLCD
+	ld hl, .SavingRecordDontTurnOff
+	call PrintText
+	call WaitBGMap2
+	call SetPalettes
+	ret
+
+.SavingRecordDontTurnOff: ; 0x4e8bd
+	; SAVING RECORD… DON'T TURN OFF!
+	text_jump UnknownText_0x1bd39e
+	db "@"
+
+InitDisplayForRedCredits: ; 4e8c2
+	call ClearBGPalettes
+	call ClearTileMap
+	call ClearSprites
+	call DisableLCD
+	call LoadStandardFont
+	call LoadFontsBattleExtra
+	hlbgcoord 0, 0
+	ld bc, vBGMap1 - vBGMap0
+	ld a, " "
+	call ByteFill
+	hlcoord 0, 0, wAttrMap
+	ld bc, SCREEN_WIDTH * SCREEN_HEIGHT
+	xor a
+	call ByteFill
+	ld hl, wBGPals1
+	ld c, 4 tiles
+.load_white_palettes
+	ld a, LOW(PALRGB_WHITE)
+	ld [hli], a
+	ld a, HIGH(PALRGB_WHITE)
+	ld [hli], a
+	dec c
+	jr nz, .load_white_palettes
+	xor a
+	ld [hSCY], a
+	ld [hSCX], a
+	call EnableLCD
+	call WaitBGMap2
+	call SetPalettes
+	ret
+
+ResetDisplayBetweenHallOfFameMons: ; 4e906
+	ld a, [rSVBK]
+	push af
+	ld a, BANK(wDecompressScratch)
+	ld [rSVBK], a
+	ld hl, wDecompressScratch
+	ld bc, wScratchAttrMap - wDecompressScratch
+	ld a, " "
+	call ByteFill
+	hlbgcoord 0, 0
+	ld de, wDecompressScratch
+	ld b, 0
+	ld c, 4 tiles
+	call Request2bpp
+	pop af
+	ld [rSVBK], a
+	ret