Add: naval battle game!

src/kernel/kmain.c

@@ -16,6 +16,7 @@
 #include "kheap.h"
 #include "initrd.h"
 #include "../programs/programs.h"
+#include "../libc/crypto.h"
 
 void kmain(multiboot2_info *mb_info)
 {

src/kernel/shell.c

@@ -144,6 +144,7 @@ void shell_install()
   register_command("cat", program_cat);
   register_command("bmp", program_bmp);
   register_command("lspci", program_lspci);
+  register_command("naval", program_navalbattle);
 
   for (;;)
   {