chore: Add comment for a possible finder enhancement

Author: pawamoy

src/griffe/finder.py

@@ -1,5 +1,16 @@
 """This module contains the code allowing to find modules."""
 
+# NOTE: it might be possible to replace a good part of this module's logic
+# with utilities from `importlib` (however the util in question is private):
+# >>> from importlib.util import _find_spec
+# >>> _find_spec("griffe.agents", _find_spec("griffe", None).submodule_search_locations)
+# ModuleSpec(
+#     name='griffe.agents',
+#     loader=<_frozen_importlib_external.SourceFileLoader object at 0x7fa5f34e8110>,
+#     origin='/media/data/dev/griffe/src/griffe/agents/__init__.py',
+#     submodule_search_locations=['/media/data/dev/griffe/src/griffe/agents'],
+# )
+
 from __future__ import annotations
 
 import ast