add pr testing for component explorer

[awentzel]

Pull Request

📖 Description

Implements PR testing for the component explorer site.

• Deploys to Azure Static Web Apps
• Generates link to view the site embedded in PR comment
• Redefines workflow with jobs running in parallel
• Improves perf sharing between jobs with uploading/downloading artifacts so only have to build once

🎫 Issues

n/a, feature addition

👩‍💻 Reviewer Notes

This will require testing several key scenarios.

1. only merges to master branch should fire documentation build and deployment to https://stage.www.fast.design
2. only PR events should fire build and deployment to static web apps and that content will be destroyed on pr close.
3. Verify outside contributors
4. Verify inside contributors
5. Verify on merge to master

📑 Test Plan

✅ Checklist

General

• I have included a change request file using $ yarn change
• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation and followed the standards for this project.

Component-specific

• I have added a new component
• I have modified an existing component
• I have updated the definition file
• I have updated the configuration file

⏭ Next Steps

Replicate this workflow change to other deployment sites.

[github-actions]

Azure Static Web Apps: Your stage site is ready! Visit it here: https://blue-coast-0df7a6610-5365.centralus.azurestaticapps.net

[github-actions]

Azure Static Web Apps: Your stage site is ready! Visit it here: https://blue-coast-0df7a6610-5365.centralus.azurestaticapps.net

[github-actions]

Azure Static Web Apps: Your stage site is ready! Visit it here: https://purple-ocean-0b7ce3410-5365.centralus.azurestaticapps.net