feat: some refactors

kernel/drivers/keyboard.c

@@ -10,6 +10,7 @@
 #include <libc/stdbool.h>
 #include <libc/ringqueue.h>
 #include <mem/mem.h>
+#include <libk.h>
 
 
 const char scancode_map_lowercase[] = {
@@ -88,7 +89,7 @@ char getc() {
 KeyEvent *get_next_event() {
     KeyEvent *target = malloc(sizeof(KeyEvent));
     if (!ring_buffer_get(keyboard_event_buffer, target)) {
-        asm("hlt");
+        k_wait_for_interrupt();
         free(target);
         return NULL;
     }