Handle types/ and non types/ dirs

Summary: Not sure why, but I needed this change to get the pyrefly integration working.

Reviewed By: martindemello

Differential Revision: D97328153

fbshipit-source-id: a4732dbd4bf73c5d843a27679bbc6fa55e4a8604

Author: alexmalyshev

cinderx/PythonLib/cinderx/compiler/static/pyrefly_info.py

@@ -322,7 +322,10 @@ class Pyrefly:
     """Manages type information emitted by pyrefly."""
 
     def __init__(self, type_dir: str) -> None:
-        self.type_dir = type_dir
+        # Buck always specifies the top-level directory, so double-check if there's a
+        # types/ subdirectory and use that if it exists.
+        types_subdir = os.path.join(type_dir, "types")
+        self.type_dir = types_subdir if os.path.isdir(types_subdir) else type_dir
 
     def load_type_info(self, module_name: str) -> PyreflyTypeInfo | None:
         if self.type_dir is None: