[Kernel] Set up page fault handler early

Author: codyd51

kernel/kernel/kernel.c

@@ -75,6 +75,8 @@ void _start(axle_boot_info_t* boot_info) {
     serial_init();
 
     // Kernel features
+    void _handle_page_fault();
+    interrupt_setup_callback(INT_VECTOR_INT14, (int_callback_t)_handle_page_fault);
     pmm_init();
     vmm_init(boot_info->boot_pml4);