Add deprecation notice to QuantumCliffordPlots

[Krastanov]

Trying out the new capabilities from JuliaLang/Pkg.jl#4433

[DilumAluthge]

@ericphanson Can we have some checks in RegistryCI to check that the formatting of this kind of metadata is correct?

I guess the first thing to check is that the only top level keys are name, uuid, repo (all of which are required), and then a top-level metadata table, which is optional.

[DilumAluthge]

@Krastanov Can I keep this open for now, to use in testing?

[DilumAluthge]

@ericphanson For additional checks, should we require that if metadata.deprecated exists, then a reason is provided?

[ericphanson]

yeah, might be good. could also check alternative, if provided, is the name of a package in the registry

[Krastanov]

@Krastanov Can I keep this open for now, to use in testing?

Certainly! I just wanted to get the ball rolling. Thanks for taking care of the maintenance of these capabilities!

[github-actions]

This pull request has been inactive for 30 days and will be automatically closed 7 days from now. If this pull request should not be closed, please either (1) fix the AutoMerge issues and re-trigger Registrator, which will automatically update the pull request, or (2) post a comment explaining why you would like this pull request to be manually merged. [noblock]

[ericphanson]

Maybe we should merge this and open issues for follow-ups?

[DilumAluthge]

Cross-ref: JuliaLang/Pkg.jl#4433

Cross-ref: https://github.com/JuliaLang/Pkg.jl/blob/adbb0f68b6cec6a9bf443c16890980286d5cfffa/docs/src/registries.md#deprecated-packages