[Draft] Avatar picker

[etoledom]

Closes #

To do:

• [ ] Implement v3 version of image upload (not ready yet)
• [ ] Implement new oauth UI with magic code (not sure if it's ready)
• [ ] UI for unauthorized (the user cancels the promp to oauth) (or maybe we just dismiss the editor 🤔 )
• [ ] Error handlings. Find a proper way to show possible request errors (maybe with the toast)
• [ ] Notify back to the 3rd party of the new image selected
• [ ] Refresh local image cash with the new uploaded image
• [ ] Review the code already in place
  • It would be good to make PRs agains this branch for discussions
• [ ] Injectable image picker replacing the native one (by 3rd parties)
• [ ] Add open-api specs of the new endpoints (when ready)

Testing Steps

[pinarol]

@etoledom is this draft PR still necessary?