add null object and add load const

src/runtime/objects/object.c

@@ -3,10 +3,17 @@
 #include "../runtime.h"
 #include <string.h>
 
+ArgonObject *BASE_OBJECT = NULL;
+
+void init_base_field() {
+    add_field(BASE_OBJECT, "test", BASE_OBJECT);
+}
+
 ArgonObject* init_argon_object() {
     ArgonObject *object = ar_alloc(sizeof(ArgonObject));
     object->type = TYPE_OBJECT;
     object->typeObject = NULL;
+    object->baseObject = BASE_OBJECT;
     object->fields = createHashmap();
     memset(&object->value, 0, sizeof(object->value));
     return object;