docs(previews): Astro tutorial and example

[ahuseyn]

Description

This PR adds a new tutorial to HWP Previews plugin, teaching how to implement the plugin with an Astro front-end.
It also moves the Astro Previews example from generic examples folder to [plugin]/examples folder.

Related Issue

• docs(previews): Add an Astro example and a tutorial #510

Dependant PRs

Type of Change

• ✅ Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactoring (no functional changes)
• 📄 Example update (no functional changes)
• 📝 Documentation update
• 🔍 Performance improvement
• 🧪 Test update

How Has This Been Tested?

Screenshots

Checklist

• I have read the CONTRIBUTING document
• My code follows the project's coding standards
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• Any dependent changes have been highlighted, merged or published

[changeset-bot]

⚠️ No Changeset found

Latest commit: f99b3a0

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

📦 Plugin Artifacts Ready!

Download from GitHub Actions run

Available plugins:

• ✅ hwp-previews.zip
• ✅ wpgraphql-logging.zip

See the "Artifacts" section at the bottom of the Actions run page

[josephfusco]

Note that while working through the tutorial I noticed that the plugin artifact from this pull request is failing in WordPress - Issue created here #550

[josephfusco]

LGTM!