PR Automation: Unit tests / Lint / Astyle / spotless / etc

[halfaleague]

PR Automation: Unit tests / Lint / Astyle / spotless / etc

Spotless should be applied.

We want to be able to test our code using the existing Github actions.
We want to be able to lint our python and format all the code.
Create examples of Java / Python unit tests.
Research ways to make existing robot code more testable / modular.
Share findings with other devs.
Java unit tests
Python unit tests.