prepare for open source release

[jdugan1024]

• add LICENSE
• add docs/PULL_REQUEST_TEMPLATE.md
• add docs/CONTRIBUTING.md
• review / update README
• rename master -> main
• improve docs
• test examples
• setup CI to do linting checks
• add tests (see add tests #2)
• create NPM project
• add CI/CD to build and publish on tag
• tag first release

[jdugan1024]

This is being done in the prep-for-release branch

[jdugan1024]

Moving some parts of this out of this issue to get this unblocked

Write tests #2
Better docs #4
Test examples #5