chore: import upstream snapshot with attribution

lightrag/parser/__init__.py

@@ -0,0 +1,13 @@
+"""Document parsing layer.
+
+Sub-packages and modules:
+
+- ``routing``: parser engine selection and per-file parser directives.
+- ``debug``: minimal ``LightRAG`` stand-in for offline parser debugging.
+- ``cli``: ``python -m lightrag.parser.cli`` entry point for single-file
+  parser debugging across all engines.
+- ``docx``: native ``.docx`` parser. Additional native format parsers
+  should live as sibling sub-packages here (e.g. ``parser/pdf/``).
+- ``external``: adapters for external parsing services (``mineru``,
+  ``docling``) that post to a remote API and cache the raw bundle.
+"""