submodule containing a function or class of the same name as the submodule won't be identified

Expected Behavior/Steps to reproduce

if we have a submodule something with a function something inside that submodule, both the function and submodule should appear in the generated docs.

Actual Behavior

only the function appears in the docs. this is because in the self.doc dict of a pdoc.Module, they will have the same key and thus the module will never be added.

on line 755 we have:

for root in iter_modules(self.obj.__path__):
  # Ignore if this module was already doc'd.
  if root in self.doc:
    continue

but this erroneously skips adding the submodule.

the fix might be as simple as appending :module to the root key before we store it in the dict, but I'm not sure if this would break things downstream.

Additional info

• pdoc version: 0.11.1

Start in pdoc.Module around line 755, where iter_modules populates self.doc and skips roots already present. Trace how self.doc keys are consumed downstream before choosing a distinct module key. Done means a submodule and same-named function both appear in the generated documentation without breaking existing lookups.