[New Check]: checks around stabilization groups

[arthurzam]

Is there an existing such new check request for this?

• [X] I have searched the existing issues

Explain

• [ ] existing package
• [ ] each atom is just simple cat/pkg
• [ ] the package has at least one version that is stable on at least one arch
• [ ] (?) should we allow package being in multiple groups?

Examples

No response

Output message

No response

Documentation

No response

Result level

error