As a developer, I want to have java template repo

[jordanpadams]

💪 Motivation

...so that I can kick-off a project with all the things the PDS expects as part of the repo. (and it builds with CI/CD too!)

📖 Additional Details

See NASA-PDS/template-repo-python#13 for some additional things we want to add as well. Basically, we want to have a stable template java repo.

• Add a template "Hello World"-like doc source page so the mvn site can be built via CI/CD
• Create a Github Pages branch to push the docs to as part of CI/CD
• Add 1 template java test so mvn test can successfully run via CI/CD (e.g. sys.exit(0))
• Update default docs to look similar to NASA-PDS/pds-template-repo-python
• Update stable_cicd.yaml to use latest roundup (e.g. triggered by release/* branch)
• Add CONTRIBUTOR guide - github says some things here but open to something apache-like
• Add CODE_OF_CONDUCT - example from some SMD folks, but open to something apache-like

[jordanpadams]

@nutjob4life per your comment on the maven testing, I recommend we retrofit this repo to be a java template and use this for your testing.