PWA icon customization (#10341)
* Use a single icon file with 'any' size for PWA
* Add Blocks.pwa_icon option for the developer to specify the PWA icon
* add changeset
* Add docstring
* Use favicon_path for PWA icons
* target blank
* format
* add changeset
* Add a new section about PWA to the guide
* Add pwa_icon path to proxy config
* Move guide image files to another repo
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Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>
Co-authored-by: Abubakar Abid <abubakar@huggingface.co>
