[FEATURE] AzureBlob integration

[georgeh0]

As users asked, we want to add support to Azure Blob Storage as a source.

AmazonS3 is an existing integration with similar Amazon S3, with similar capability as AzureBlob:
https://github.com/search?q=repo%3Acocoindex-io%2Fcocoindex%20AmazonS3&type=code

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[badmonster0]

#736 - PR pending