Added string.h header with itoa function that converts an int to a ASCII string

src/kernel/string.c

@@ -0,0 +1,18 @@
+#include "string.h"
+
+char* itoa(uint32_t val, uint8_t base) {
+    static char buf[32] = { 0 };
+
+    if (base == 0 || base > 16) {
+        // TODO: Add errors!!
+        return buf;
+    }
+ 
+    int i = 30;
+    for (; val && i; i--, val /= base) {
+        buf[i] = "0123456789abcdef"[val % base];
+    }
+
+    return &buf[i + 1];
+}
+

src/kernel/string.h

@@ -0,0 +1,8 @@
+#ifndef STRING_H
+#define STRING_H
+
+#include "stdint.h"
+
+char* itoa(uint32_t val, uint8_t base);
+
+#endif