* Refactored drag n drop functionality to a hook and component.
* Add the snackbar to the article editor.
* Now you can drag and drop images in the post body content.
* Cleaning up a few things.
* Now post cover images can be dragged and dropped.
* Removed unused empty function.
* Added @testing-library/preact-hooks so that we can test hooks.
* Some renaming, small refactor.
* Added tests
* Added more tests.
* Added more tests.
* Added message about dropping only one image in post body.
* Added message about dropping only one image for cover image.
* put onDrop into it's own meethod.
* More tests.
* Added some API documentation.
* Updated editor help with drag and drop image help.
* drag and drop styling
* .
* revert
* Fixed broken test.
Co-authored-by: Nick Taylor <nick@dev.to>
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