Publicize the recursiveDelete method for deleting subcollections

[dandv]

Please make sure you have searched for information in the following guides.

• [X] Search the issues already opened: https://github.com/GoogleCloudPlatform/google-cloud-node/issues
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Documentation Request

Deleting a subcollection and all of its documents and their subcollections recursively is a common requirement. Yet neither of these Google resources mention recursiveDelete:

• https://firebase.google.com/docs/firestore/manage-data/delete-data#collections
• https://firebase.google.com/docs/firestore/solutions/delete-collections

recursiveDelete has been available since v4.11.0, released May 2021. Yet Gemini Thinking doesn't know about it, and reinvents the wheel:

[milaGGL]

Hi @dandv, thank you for reporting this issue. There is an internal ticket created for better documentation for the BulkWriter's, including the recursive delete. I will keep this thread updated once there is a progress.

Googler please see b/328629755.