[REQUEST] Create a github workflow to run CI

[sagesmith-wf]

Description

I have noticed that CI doesn't run for external contributors. After discussion internally, it is recommended that we convert the build and artifact publish to a github workflow setup.

What needs to happen

• CI is run on each PR via a github actions workflow
• When a PR is merged, a new release is created
• The release is pushed to PYPI
• The release is adds the PYPI artifact to the list
• The js package is published to NPM

Notes

• Some inspiration can be drawn from https://github.com/Arelle/Arelle/tree/master/.github/workflows

[austinmatherne-wk]

It's worth pointing out that the existing Python build isn't used internally (npm artifact is used). We need to make sure that's in a working state (and probably just publish the js file to npm).

[sagesmith-wf]

The PYPI artifact is still required for arelle, but I will do some work to see how we might handle this