Summary

• add a read-only my-apps/search-app-store ability for browsing/searching the default My Apps App Store catalog
• include default catalog metadata, deep links, categories, app/plugin filters, and optional curated plugin recommendations
• update AI Assistant domain hints and README docs so app-store questions route to My Apps

Verification

• php -l class-my-apps.php
• git diff --check

Note: composer run check-cs could not run because ./vendor/bin/phpcs is not installed in this checkout.