Packages: maven - granular permissions and easy organization sharing

[github-product-roadmap]

Summary

This enhances GitHub Packages support for maven by allowing granular permissions for individual packages and easier sharing within the organization.

Intended Outcome

This change introduces several improvements:

• publish packages on organization level, in addition to repository level
• have fine-grained access control over their maven packages, decoupled from the repository permissions
• have internal visibility settings for maven packages, in addition to private and public
• give permissions to packages independently for Actions and Codespaces
• increase performance and maintain more package versions than earlier

How will it work?

Packages are published to the organization and permissions and visibility are managed on the package itself.