feat: remove uppy and use upload hooks

[pyphilia]

This PR removes the use of uppy everywhere. We now use real mutations to upload files for:

• item thumbnail: I didn't change the layout
• h5p: a button
• zip: a button
• files: file drop zone

My implementation is a mixed of showing upload progress within the drop zone and toaster. The reason is that we sometimes clear the dropzone before the complete upload is finished. Here are the 3 ways we can upload files:

• from the dropzone in the screen (when the folder is empty): use toast because the view is updated at the first item upload (websockets).
• from new item modal: the loading is show in the dropzone, and the modal closes when it finishes
• drop in a folder that already contains items: the dropzone disappear immediately, so the loading and errors happens in toastr.

A bug I've noticed is that the backend actually cannot handle multiple files upload (it gets stuck and never return for more than 1 file). Uploading one file is okay, and was actually working with uppy because uppy was sending one file at a time! So I faked this behavior by sending one request per file.
Something that could considered a glitch is "showing n notifications when uploading n files". This is because the notifications are triggered by query client. Personally I think it is okay, but let me know what you think.

Screen.Recording.2024-06-21.at.17.42.55.mov

TODO:

• write tests

[spaenleh]

Looks good, just a few nitpicks and comments ! Very nice !

[spaenleh]

@pyphilia Does this PR also fix some of the issues highlighted in #572 ?

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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