Bootstrap extension anonymize config

Write the anonymize section so shopware-cli project dump --anonymize rewrites this extension's personal data and integration secrets. Change only that section. Leave the rest of the config file as it is.

Work on one extension at a time, from that extension's root.

Confirm this is an extension

An extension root has one of:

• composer.json with "type": "shopware-platform-plugin" or "shopware-bundle"
• manifest.xml (Shopware app)

If the directory is a Shopware project, stop. Project dump rules belong in .config/shopware-project.yml under dump.rewrite.