chore: import upstream snapshot with attribution

vllm/parser/__init__.py

@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+
+from vllm.parser.abstract_parser import (
+    DelegatingParser,
+    Parser,
+)
+from vllm.parser.harmony import HarmonyParser
+from vllm.parser.parser_manager import ParserManager
+
+__all__ = [
+    "Parser",
+    "DelegatingParser",
+    "HarmonyParser",
+    "ParserManager",
+]