feature: multiple screens + cursor move (bug to fix)

style: reorganise code structure

headers/kprintf.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <stdarg.h>
+
+enum print_level {
+    KERN_EMERG,
+    KERN_ALERT,
+    KERN_CRIT,
+    KERN_ERR,
+    KERN_WARNING,
+    KERN_NOTICE,
+    KERN_INFO,
+    KERN_DEBUG,
+    KERN_DEFAULT,
+    KERN_CONT
+};
+
+int kprintf(int level, const char *restrict format, ...);
+int kvprintf(int level, const char *restrict format, va_list ap);