Docs: Use new learning resources in Playground documentation #1258
Description
Let's include all the excellent new learning resources about Playground in the documentation:
- WordPress Playground: the ultimate learning, testing, & teaching tool for WordPress
- Introduction to Playground
- Blueprints 101
Done is
- A PR that replaces chunks of outdated content on pages like "Getting started", "About Blueprints", "What is Playground" with links to relevant learning resources OR with excerpts from those resources.