Remove mmio, port io, and debug headers from kernel side, and keep them on the libc. Simplify debugging functions. Add missing comments in several locations. Move ANSI color definitions in a separate file.

programs/edit.c

@@ -4,7 +4,7 @@
 #include <termios.h>
 #include <stdbool.h>
 #include <string.h>
-#include <debug.h>
+#include <io/debug.h>
 #include <stdio.h>
 #include <ctype.h>
 #include <fcntl.h>

programs/kill.c

@@ -9,7 +9,7 @@
 #include <limits.h>
 #include <strerror.h>
 #include <ctype.h>
-#include <debug.h>
+#include <io/debug.h>
 
 static inline int is_number(char *s)
 {

programs/login.c

@@ -14,7 +14,7 @@
 #include <pwd.h>
 #include <strerror.h>
 #include <stdlib.h>
-#include <debug.h>
+#include <io/debug.h>
 
 #include "ansi_colors.h"
 

programs/ls.c

@@ -14,7 +14,7 @@
 #include <sys/stat.h>
 #include <libgen.h>
 #include <sys/bitops.h>
-#include <debug.h>
+#include <io/debug.h>
 
 #define FLAG_L (1U << 0U)
 #define FLAG_A (1U << 1U)

programs/shell.c

@@ -9,7 +9,7 @@
 #include <libgen.h>
 #include <sys/stat.h>
 #include <signal.h>
-#include <debug.h>
+#include <io/debug.h>
 #include <sys/bitops.h>
 #include "stdbool.h"
 #include "stddef.h"