purl-next: HuggingFace - on demand, data collection

[TG1999]

https://huggingface.co/api/models/distilbert/distilbert-base-uncased?revision=043235d6088ecd3dd5fb5ca3592b6913fd516027

[TG1999]

This is done now

Reference:

• Add huggingface collector for on demand collection #717

Steps to test:

• To test this, install purldb, set it up using the README, and run make run. This will start server at http://127.0.0.1:8001/.
• Make a request to http://127.0.0.1:8001/api/collect/?purl=pkg:huggingface/distilbert/distilbert-base-uncased@043235d6088ecd3dd5fb5ca3592b6913fd516027
• You will get a response like this

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        "filename": "pytorch_model.bin",
        "package_sets": [],
        "package_content": "source_archive",
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        "type": "huggingface",
        "namespace": "distilbert",
        "name": "distilbert-base-uncased",
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        "qualifiers": "",
        "subpath": "",
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        "release_date": "2022-03-02T23:29:04Z",
        "parties": [
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                "role": "author",
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            }
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        "keywords": [],
        "homepage_url": "https://huggingface.co/distilbert/distilbert-base-uncased",
        "download_url": "https://huggingface.co/distilbert/distilbert-base-uncased/resolve/043235d6088ecd3dd5fb5ca3592b6913fd516027/pytorch_model.bin",
        "bug_tracking_url": null,
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        "other_license_expression_spdx": null,
        "other_license_detections": [],
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