[Maintenance] [th03/th04/th05] Cutscenes: Move into a separate subdirectory

Thanks to TH03 having text-below-picture cutscenes before stages 8 and
9, the `/end/` directory is the wrong place to keep this code. And as
we're soon going to see, this feature did evolve during these three
games.

Part of P0223, funded by Blue Bolt and rosenrose.

th04/maine011.cpp

@@ -5,4 +5,4 @@
 
 #pragma option -zCmaine_01_TEXT
 
-#include "th04/end/box.cpp"
+#include "th04/cutscene/box.cpp"

th04_maine.asm

@@ -4665,7 +4665,7 @@ include th03/snd/se_state[data].asm
 include th04/hardware/bgimage[data].asm
 include th03/formats/cdg[data].asm
 include th03/formats/pi_put_masked[data].asm
-include th04/end/box[data].asm
+include th04/cutscene/box[data].asm
 asc_EB84	db '  ', 0
 	even
 aSff1_pi	db 'sff1.pi',0
@@ -4752,7 +4752,7 @@ include th02/snd/load[bss].asm
 include th04/mem[bss].asm
 include th04/hardware/input[bss].asm
 include th04/formats/cdg[bss].asm
-include th04/end/cutscene_script[bss].asm
+include th04/cutscene/cutscene[bss].asm
 dword_1247A	dd ?
 byte_1247E	db ?
 		db 61 dup(?)

th05/maine011.cpp

@@ -5,7 +5,7 @@
 
 #pragma option -zCmaine_01_TEXT
 
-#include "th04/end/box.cpp"
+#include "th04/cutscene/box.cpp"
 #include "shiftjis.hpp"
 
 /// String-to-color map

th05_maine.asm

@@ -7604,7 +7604,7 @@ include th03/formats/cdg[data].asm
 public _colmap_count
 _colmap_count	db 0
 	evendata
-include th04/end/box[data].asm
+include th04/cutscene/box[data].asm
 asc_1085A	db '  ', 0
 	even
 byte_1085E	db 0
@@ -7886,7 +7886,7 @@ include th04/hardware/input[bss].asm
 include th04/formats/cdg[bss].asm
 include libs/master.lib/pfint21[bss].asm
 include th04/hardware/egcrect[bss].asm
-include th04/end/cutscene_script[bss].asm
+include th04/cutscene/cutscene[bss].asm
 		db 4 dup(?)
 byte_14F8E	db ?
 		db 60 dup(?)