feat: Segmentation model API prototype

[intsco]

The PR adds support of a simple segmentation model API where every container has it's own internal job queue, an image storage and a worker thread. All segmentation requests are handled asynchronously after the initial POST request. The results can be fetched with a GET request afterwards using the provided job_id.

Details:

• Refactored and split API creation depending on model_type.
• Separate modules for classification and segmentation models.
• logger module.
• Segmentation API tests and test data.
• Bumped version.
• pytest

[intsco]

@koosk I guess the GH UI should provide a way to review only the changes since your last review. If it's not the case, feel free to skip this review request. BTW, I addressed some and tried to answer the other your comments.