[router] add reasoning parser base structure (#9310)

Co-authored-by: Chang Su <chang.s.su@oracle.com>

.pre-commit-config.yaml

@@ -38,7 +38,7 @@ repos:
     hooks:
       - id: codespell
         additional_dependencies: ['tomli']
-        args: ['--toml', 'python/pyproject.toml', '-L', 'cann']
+        args: ['--toml', 'python/pyproject.toml', '-L', 'cann,thi']
         exclude: |
           (?x)^(
             test/srt/test_reasoning_parser\.py|