OneDep API interactions

[sofyalaski]

• [ ] research if all our use cases are present in API
• [x] write backend that would invoke correct API calls depending on the user frontend inputs
• [x] upload files
• [x] extract metadata from mrc files (pixel spacing and contour)
• [x] ask EBI if it's planned to introduce that feature in production
• [ ] define minimal deposition based on each experiment type - exposed to frontend - should not allow sending request to /onedep unless form is complete
• [ ] allow only certain extension for files
• [x] contour level can be a non-negative float
• [x] make user put contour
• [x] contour level same for all -> copied from first entry
• [ ] add a button for "additional map(s)
• [x] ask about validation API ( definition )
• [ ] user can input list of orcid ids
• [x] invoke the converter to mmCIF ( but cannot yet include to the API request due its limitations for now)

[sofyalaski]

Support for multiple experiment technique in beta