ci: add gh-actions workflow

[erisu]

Motivation and Context

Migrate paramedic to GH Actions

• Appium tests are not passing but everything else is running OK. No core plugins uses Appium test for android.

Testing

• Chrome: https://github.com/erisu/cordova-paramedic/actions/runs/1175218752
• Android: https://github.com/erisu/cordova-paramedic/actions/runs/1175218751
• iOS: https://github.com/erisu/cordova-paramedic/actions/runs/1175218750

Checklist

• I've run the tests to see all new and existing tests pass

[zachawilson]

This is looking good to me.

As additional testing, I have forked and run a GitHub Action workflows for cordova-plugin-statusbar using this cordova-paramedic at the latest commit 2dbc650

• android https://github.com/SwitchCaseGroup/cordova-plugin-statusbar/runs/3447269881
• ios https://github.com/SwitchCaseGroup/cordova-plugin-statusbar/actions/runs/1175705680

[dpogue]

I see some Q usage here that I'm always in favour of removing, but I suspect that's a much larger task involving the entire paramedic codebase?

[erisu]

As for the Q usage, I think we should remove it but on a separate PR. The rest of the code base is using Q.