ENH: add webp support to IPython.display.Image and complete identification of JPEG,PNG,GIF,WEBP image types by initial bytes (#14526) - So that `Image('./example.webp')` does not raise a `"Cannot embed the 'webp' image format"` error. - So that matplotlib animations saved as .webp images work (e.g. when ffmpeg+h264 isn't working).

Fix str error in path again

Fix str error in path

Refactor with Pathlib for setupbase.py

DOC: whatsnew/version8.rst: Add support for WEBP to IPython.display.Image

DOC: include WEBP in the display.Image docstring

CLN: remove self. from the _GIF1 and _GIF2 globals

CLN: core/display: reformat per darker

CLN: core/display: reformat per darker

CLN: core/display: pep8 specifies double newlines between module-level callables