Buildpacks Lifecycle Prepare Phase

Buildpacks are a kind of framework for preparing a container environment for your apps. Lifecycle is a particular workload that needs to run one by one in order. A Lifecycle Prepare phase should make it easier for Platform Implementers to achieve parity with features of Pack. Today, features like project.toml are only supported by Pack, and a new platform would need to write it’s own parser. My goal is to create new Lifecycle phase and associated binary should be available to Platform Implementers, and should be executed by Pack.