The core crate that exposes APIs designed for full programmatic
configuration of migrations.
See migrate crate if you need a CLI wrapper instead.
The crate is built on top of [migrate_state] and the ideas outlined there.
The main entities here are the [Migration] trait and the [Plan]
structure that is used to manage the [Migration]s that should be executed.
The migrations may also be run in different modes ([MigrationRunMode])
that allows for running them for real or for debugging (a.k.a dry-run).
See the docs for [Plan] to continue learning the API of this crate.