Add process scheduler, pipes, and separate terminal from shell

src/lib/memory.c

@@ -22,7 +22,7 @@ void *memory_allocate(uint64_t size) {
     free_list->next = NUL;
   }
 
-  size = sizeof(free_chunk_t) + (size + 7) & (uint64_t)~7;
+  size = sizeof(free_chunk_t) + ((size + 7) & (uint64_t)~7);
 
   free_chunk_t *prev = NUL;
   free_chunk_t *curr = free_list;