fix: wrong folder, put in root

srcs/ft_putrptr.c

@@ -0,0 +1,13 @@
+#include "libft.h"
+
+int ft_putptr(void *ptr)
+{
+    int count = 0;
+
+    count += ft_putstr("0x");
+    if (!ptr)
+        count += ft_putchar('0');
+    else
+        count += ft_putaddr((unsigned long)ptr);
+    return (count);
+}