Add support for pasting images

[HugoGresse]

• you can now paste image using (ctrl+v or cmd+v) from a copy of an image of another tab when the side panel image upload is open

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit c302408):

https://conferencecenterr--pr61-image-clipboard-5eob244u.web.app

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