feat(db): allow passing registry options

[mymichu]

Description

It is currently not possible to download the java-vulnerability-db from a private registry. This changes allows developers using the Golang package to download the java-vulnerability-db from a private container registry and pass oci-registry options. Nothing changes for a CLI user, only for developers utilising the pkg/javadb directly. I changed the Init interface of the javadb which is a breaking change, another possibility would be to add a new Initi function. Let me know what you think.

Checklist

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• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

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[DmitriyLewen]

Hello @mymichu
Thanks for your work!

I left comment. Take a look, please.

Regards, Dmitriy

[DmitriyLewen]

Thanks for your work!
LGTM.

@knqyf263 can you look and merge if everything is ok?