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/cpu/timer.c

@@ -40,7 +40,7 @@ static void timer_callback(registers_t regs) {
 
 void sleep(u32 milliseconds) {
     u32 done = tick + milliseconds;
-    while (done != milliseconds) {
+    while (tick != done) {
         k_wait_for_interrupt();
     }
 }