fix: add: threads to process

src/multitasking/process.c

@@ -46,13 +46,19 @@ struct pcb *create_process(uint8_t uid)
 		return NULL;
 	}
 	memcpy(new_pcb->heap, current_pcb->heap, 4096);
+
+	if (current_pcb) {
 		new_pcb->next = current_pcb->next;
 		new_pcb->prev = current_pcb;
 		current_pcb->next = new_pcb;
 		if (current_pcb->prev == current_pcb)
 			current_pcb->prev = new_pcb;
-
+	}
+	else {
+		current_pcb = new_pcb;
+	}
 	new_pcb->signals.pending = SIG_IGN;
+	new_pcb->thread_list = NULL;
 
 	return new_pcb;
 }

src/multitasking/thread.c

@@ -28,9 +28,14 @@ struct tcb *create_thread(struct pcb *process, void (*routine)(void))
 	new_tcb->state = NEW;
 
 	struct tcb *it = process->thread_list;
+	if (it) {
 		while (it)
 			it = it->next;
 		it = new_tcb;
+	}
+	else {
+		process->thread_list = new_tcb;
+	}
 
 	return new_tcb;
 }