fix: add "resource" to reserved class names

The "resource" type keyword should be treated as a reserved class name to prevent it from being used as a class name, consistent with other built-in type keywords like "mixed", "object", and "iterable".

Author: jordikroon

Zend/zend_compile.c

@@ -215,6 +215,7 @@ static const struct reserved_class_name reserved_class_names[] = {
 	{ZEND_STRL("iterable")},
 	{ZEND_STRL("object")},
 	{ZEND_STRL("mixed")},
+	{ZEND_STRL("resource")},
 	/* These are not usable as class names because they're proper tokens,
 	 * but they are here for class aliases. */
 	{ZEND_STRL("array")},