Add reasoning parser mechanism + qwen3 parser + bugfixes

qwen3_6_scripts/reasoning/__init__.py

@@ -0,0 +1,16 @@
+"""
+Reasoning parser module for vLLM 0.6.3 (BI-V100 / Qwen3.6-27B adaptation).
+
+Usage: --reasoning-parser qwen3
+"""
+
+from vllm.reasoning.abs_reasoning_parsers import ReasoningParser, ReasoningParserManager
+
+__all__ = ["ReasoningParser", "ReasoningParserManager"]
+
+# Lazy-register Qwen3 parser; imported on first get_reasoning_parser("qwen3").
+ReasoningParserManager.register_lazy(
+    "qwen3",
+    "vllm.reasoning.qwen3_reasoning_parser",
+    "Qwen3ReasoningParser",
+)