maven build workflow

[jamesmarkchan]

workflow for maven build.

the workflow should compile all our java classes and can be defined in .github/workflows/build.yml

to start the branch get the latest dev branch than use git checkout -b feature/maven`

Definition of Done:

1. defined by a working pom.xml
2. all classes compile without error in workflow pipeline
3. commits that perform the recommended file structure via renames
4. produces a usable zip similar to the original on branch named feature/maven