WP playground integration

[kirtangajjar]

Description of the Change

Add WP Playground integration

Closes #46

How to test the Change

1. Go to https://playground.wordpress.net/?blueprint-url=https://raw.githubusercontent.com/10up/simple-google-news-sitemap/feature/playground-integration/.github/blueprints/blueprint.json and see that you see a working environment.

Changelog Entry

Added - WP Playground Integration

Credits

Props @kirtangajjar

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added Critical Flows, Test Cases, and/or End-to-End Tests to cover my change.
• All new and existing tests pass.

[dkotter]

This step doesn't work. importFile doesn't seem to be supported anymore but this doesn't point to an actual file, just a URL. If the goal here is to import some test data, this is what we do in a few other plugins:

    {
      "step": "importWxr",
      "file": {
        "resource": "url",
        "url": "https:\/\/raw.githubusercontent.com\/WordPress\/theme-test-data\/42c0fdc29d0055c276fc9fdd335a672a8133c605\/theme-preview.xml"
      }
    }

While that does work here and will import content, because the the News Sitemap only pulls in recent content, none of this imported content will show up. So either we need to create new content that has timestamps from the last couple days or just remove this step and just have the default Hello World post and Sample Page show up