Organize libc64 files (#1492)

* Move qrand to libc64

* use an union to avoid type punning

* __osMalloc

* math64.c

* fixed_point.h

* sleep

* aprintf.h

* sprintf

* malloc

* use original names on aprintf.c and malloc.c

* qrand cleanup pass

* use original names of sleep.c

* og names for sprintf

* more cleanup

* format

* fixes

* whoops

* use ARRAY_COUNT again

* comment

* Use `fu`

* forgot this one

* review

* fix

* sneak a tiny cleanup

src/code/code_80183070.c

@@ -1,7 +1,8 @@
 #include "global.h"
+#include "libc64/sleep.h"
 
 void func_80183070(void) {
     for (;;) {
-        Sleep_Msec(1000);
+        msleep(1000);
     }
 }