feat: tier-1 compiler-runner with vendored RAGFlow markdown parser (#124)

THIRD_PARTY_NOTICES.md

@@ -0,0 +1,14 @@
+# Third-party notices
+
+## RAGFlow Markdown parser
+
+- Project: RAGFlow
+- Upstream repository: <https://github.com/infiniflow/ragflow>
+- Pinned commit: `4391e03886b996201f3b8818f671b19eb24d0f7b`
+- Registered source: `deepdoc/parser/markdown_parser.py`
+- License: Apache License 2.0
+
+The verbatim upstream license and the complete path-level registration ship in
+`third_party/ragflow/`. The registered parser imports Python-Markdown, which is
+distributed under the BSD 3-Clause License; its verbatim license ships beside
+the registration as `LICENSE.python-markdown`.