As a user editing a document
I want to be able to drag a file in the editor to upload and inline use it.

### Acceptance Criteria

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* When a user drags a file onto the blocknote editor, it is uploaded and used

* A user is able to upload an image and embed a file in the blocknote editor


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#### Not part of this (tackled elsewhere):

* Make files that are uploaded appear in the &quot;Files&quot; Tab (this is handeled in <mention class="mention" data-id="67424" data-type="work_package" data-text="#67424">#67424</mention> )

* Make files block in the Blocknote Editor look nice (this is handeled in <mention class="mention" data-id="67740" data-type="work_package" data-text="#67740">#67740</mention> )


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TODO:

* [x] Implement file upload to server flow
* [x] Add dev docker MinIO setup
* [x] Implement file upload to external storage flow
* [ ] Begin of the insertionError handling (when user tries to upload a file type that is not whitelisted)
* [ ]End of the insertion Clean up Code
* Begin of the insertion[x]End of the insertion Begin of the deletion [ ]End of the deletion Check if the prepare flow also works for the upload to the server Begin of the insertion(Answer: No, needs refactoring)End of the insertion
* [ ] Add Tests