add debug build target (#4817)

* add debug build target

* fix maybe uninitialized error

* add option to undef NDEBUG

* debug for agbcc

* init instead of ignore to not break agbcc

* make clean removes modern and agbcc artifacts. explicit use of -O0 again for NOOPT

* automatically enable debug menu when building for debug

* automatically enable debug menu when building for debug

* automatically enable debug menu when building for debug

* clean up previous mess omg

* remove preproc around debug menus

* automatically enable debug menu when building for debug

* clean up previous mess omg

* Apply suggestions from code review

Co-authored-by: Bassoonian <iasperbassoonian@gmail.com>

* Update Makefile

* Update field_control_avatar.c

* make debug print independent

* remove unwanted changes

* remove trailing endif

---------

Co-authored-by: Bassoonian <iasperbassoonian@gmail.com>

data/scripts/debug.inc

@@ -1,4 +1,3 @@
-.if DEBUG_OVERWORLD_MENU == TRUE
 Debug_MessageEnd:
 	waitmessage
 	waitbuttonpress
@@ -448,5 +447,3 @@ Debug_EventScript_EWRAMCounters::
 Debug_EventScript_EWRAMCounters_Text::
 	.string "Follower Steps: {STR_VAR_1}.\n"
 	.string "Fishing Chain: {STR_VAR_2}.$"
-
-.endif