feat: setup structure for block devices

added ide block device
added mbr block device driver
started fat block device driver

reordered boot
start timer before pci/ide/etc.
enable interrupts earlier

fixed exception from ide controller

cleanup code
more printfs

kernel/libc/libc.h

@@ -8,7 +8,9 @@
 #ifndef KERNEL_LIBC_LIBC_H_
 #define KERNEL_LIBC_LIBC_H_
 
-int memcpy(char *dst, char *src, int amount);
+#include <types.h>
+
+int memcpy(u8 *dst, const u8 *src, int amount);
 
 int memset(char *dst, char data, int amount);