Provide Scan import feature endpoints

[tdruez]

In the context of automation, we should add the following Product features in the REST API:

• Import from Scan
• Load Packages from SBOMs
• Pull Project data from ScanCode.io

This would allow to automatically feed new DejaCode Products from a CI workflow, such as using https://github.com/nexB/scancode-action, for example:

• On pushing a new release/tag in my repo
• The scancode-action is triggered to run a scan_codebase pipeline
• The scan results are uploaded to a DejaCode instance into a new product, and/or to a ScanCode.io instance for review of the results.