feat: added support for waiting on an irq

kernel/cpu/isr.c

@@ -10,6 +10,7 @@
 #include <drivers/ports.h>
 #include <libc/kprintf.h>
 #include <libk/libk.h>
+#include <tasks/task.h>
 
 #define PIC_END_OF_INTERRUPT 0x20
 
@@ -142,6 +143,9 @@ void irq_handler(isr_registers_t r) {
     if (r.int_no >= 40) port_byte_out(PORT_PIC_SLAVE_COMMAND, PIC_END_OF_INTERRUPT); /* slave */
     port_byte_out(PORT_PIC_MASTER_COMMAND, PIC_END_OF_INTERRUPT); /* master */
 
+    if (r.int_no >= IRQ0 && r.int_no < IRQ15) {
+        task_notify_irq(r.int_no - IRQ0);
+    }
     /* Handle the interrupt in a more modular way */
     if (interrupt_handlers[r.int_no] != NULL) {
         isr_t handler = interrupt_handlers[r.int_no];