feat: migrate to multimodule, consolidate dependency management and p…

[akafredperry]

- What I did
Migrated the repo into a maven multimodule project
Separated out

• at_client (SDK)
• example code
• REPL (shell)
• Complimentary utility code that is not strictly SDK (and would pull in more dependencies)

closes #348

- How I did it
Added parent POM

• Added existing versions as properties
• Added dependency management for all dependencies
• Added plugin management for all common plugins
• Remove non-standard properties for configuring surefire and failsafe
• Removed integration test src (this was empty)
• Changed the names of ActivateTest and CucumberTests to they are classified as integration tests (and run by failsafe)

Adjusted at_client POM accordingly

• removed versions and plugin config which is defined in parent
• removed dependencies for jansi and webcam-capture
• removed REPL and CameraUtil

Added at_shell module for REPL

• Maven build creates executabel self contained (fat/shaded) jar

Added at_util module for REPL

Added examples module (this does not get deployed)

- How to verify it
CI and Maven Deploy workflows run all unit tests and integration tests
or checkout and run this from the top level

mvn clean install

- Description for the changelog
split at_client.jar into at_client.jar, at_shell.jar, at_utils.jar