[RFC #0113] - Additional OCI artifacts

[natalieparellano]

RFC #0113 - Additional OCI artifacts

Spec:

• https://github.com/buildpacks/spec/issues/TBD
• Released in platform API version TBD

Lifecycle:

• https://github.com/buildpacks/lifecycle/issues/TBD
• Released in lifecycle version TBD

Pack:

• https://github.com/buildpacks/pack/issues/TBD
• Released in pack version TBD

Documentation:

• https://github.com/buildpacks/docs/issues/TBD