embedding markdown package in app

Inside an macOS app a package is not installed or pipped but used as plain package inside a `python<version>` folder inside `<appName>.app/Contents/Resources`.



the latest version (3.2.2) raises an error on import of `importlib_metadata` as it cannot find his own version... (traceback below), I assume, even if this could be fixed, `importlib_metadata` will not find any registered extensions as its will never will be installed and registers as an entry_point... 



Any advice on how to use markdown without installing it? this seems now not possible



thanks for all the good work!! 



```

File "/Contents/Resources/lib/python3.7/markdown/__init__.py", line 29, in <module>

  from .core import Markdown, markdown, markdownFromFile # noqa: E402

 File "/Contents/Resources/lib/python3.7/markdown/core.py", line 26, in <module>

  from . import util

 File "/Contents/Resources/lib/python3.7/markdown/util.py", line 34, in <module>

  import importlib_metadata as metadata

 File "/Contents/Resources/lib/python3.7/importlib_metadata/__init__.py", line 602, in <module>

  __version__ = version(__name__)

 File "/Contents/Resources/lib/python3.7/importlib_metadata/__init__.py", line 564, in version

  return distribution(distribution_name).version

 File "/Contents/Resources/lib/python3.7/importlib_metadata/__init__.py", line 537, in distribution

  return Distribution.from_name(distribution_name)

 File "/Contents/Resources/lib/python3.7/importlib_metadata/__init__.py", line 205, in from_name

  raise PackageNotFoundError(name)

importlib_metadata.PackageNotFoundError: importlib_metadata

```

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