Consider replacing the Hiero Conventions Gradle Plugin

The Hiero Conventions plugin establishes a specific style and structure that may not be a good fit for all situations.

As part of encouraging broader adoption of PBJ we wish to consider removing that plugin and replacing it with local gradle configuration for greater locality of build and greater flexibility.

An alternative approach might be to split the Hiero Conventions plugin into "useful tooling" and "project preferences" then apply the tooling plugin without the project preferences.

Another possible alternative is that we may determine that removing this plugin is not beneficial to this project.