Project structure is poor

[Miles-Garnsey]

What is missing?

The folder structure in this repo is very messy.

There is a directory app under pulsar-cdc-testutil which should probably go away.

We should consider whether we want to build gradle sub-projects or switch to Bazel which would play more nicely with the polyglot nature of this repo. Gradle might be best in the short term.

Why do we need it?

The objective of this repo is to bring together tests and documentation, so that we have blogs/docs for each test case in the repo.

As such, I've made tentative steps to structure it so that we can build multiple binaries from a single repo (so we can cover multiple languages etc.), but I've been very sloppy about it.

Environment

• Testutils version:

Anything else we need to know?: