Plugin Directory: Add wp-env local development environment

[dd32]

Summary

• Adds a wp-env configuration for running the plugin directory locally with Docker
• Includes mock mu-plugins for production-only services (WPORG_Ratings, HelpScout/Trac/SVN/translate DB queries)
• Auto-imports plugin data from the WordPress.org REST API on first load (featured, popular, beta sections with users, icons, banners, tags)
• Fixes several compatibility issues in plugin-directory and theme code for non-production environments

Environment setup

cd environments && npm install
cd plugin-directory && npx wp-env start

On first page load, ~20 plugins are imported automatically from wordpress.org.

Code fixes

• Gate Jetpack Search class instantiation behind class_exists checks
• Only rewrite asset URLs to CDN when wp_get_environment_type() is production
• Fix get_site() fatal on non-multisite in locale banner route
• Fix PHP 8.2 dynamic property deprecation on WP_List_Table subclass
• Fix false-to-array deprecation in get_plugin_banner() fallback
• Fix undefined HTTP_HOST/REQUEST_URI warnings in CLI context

Test plan

• Run npx wp-env start from environments/plugin-directory/
• Verify first page load auto-imports plugins with icons, banners, and contributors
• Verify plugin single pages render without errors
• Verify no CDN URLs are loaded locally
• Verify no DB errors for missing production tables

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