Move libultra function declarations to libultra headers (#1196)

* Delete unused headers

* Move PR and io to ultra64

* move headers to ultra64

* more cleanups

* more reorganizing

* i think that should be all

* format

* ifdef guards cleanup

* Add IO_READ and IO_WRITE macros for future use

* warnings

* review

Co-authored-by: Tharo <17233964+Thar0@users.noreply.github.com>

* warnings again

* warn

* ifdef guards

* fix merge

* fix merge

* fix merge

* bss

* padutils.h

* bss

* bss

* bss

* fix merge

* bss

* bss

* bss

* fix merge

* fixes

* fixes

* bss

* bss

* fix merge

* fix

* fix

* fix includepaths

* fix paths

* bss

* fix

* ultra64/ -> PR/

* header guards

* fix ehader guards

* fix

* fix++

* format

* bss is borken

* prevent 2

* :despair:

* bss

* rename assert to dbg_hungup

* fix

* a

* fix

* bss

* fix

* bss

* bss

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Co-authored-by: Tharo <17233964+Thar0@users.noreply.github.com>

include/os_malloc.h

@@ -1,8 +1,8 @@
-#ifndef OS_MALLOC
-#define OS_MALLOC
+#ifndef OS_MALLOC_H
+#define OS_MALLOC_H
 
 #include "PR/ultratypes.h"
-#include "ultra64/message.h"
+#include "PR/os_message.h"
 #include "libc/stddef.h"
 
 typedef struct ArenaNode {