Add spec for OCaml opam packages

[LaurentGoderre]

No description provided.

[LaurentGoderre]

/cc @kit-ty-kate

[pombredanne]

@LaurentGoderre here too.... after the merge of PR #514, PURL tests and defs are now defined in new JSON schemas 👼 😇 😁 :

• See Refine Purl type schema #514

... therefore with the new approach... this PR would need to be updated.

Do you think you can update this PR to the new format?

Sorry for the churn. ❤️

[pombredanne]

@LaurentGoderre or @kit-ty-kate do you mind to update the PR using the new JSON-based approach? That would be awesome! and quite timely with:

• https://ocaml.org/changelog/2025-10-03-security-team
• the CVE schema now having PURL supported merged https://github.com/CVEProject/cvelistV5/

Pinging the Ocaml security team lead too: @hannesm

[hannesm]

Thanks for the ping. Give me until the end of the week / next Monday to go over it. I also have a package-url implementtion in OCaml that I'm happy to share soon...