Merge binary objects on multiple items into a single item

This workflow is the opposite of this one. It transforms multiple different items with one binary object named data into a single item with multiple binary objects: This can be useful when creating a single .zip archive for example. It uses the updated Code node instead of the older Function node.

Help me set up the n8n workflow "Merge binary objects on multiple items into a single item" (https://n8n.io/workflows/1916). It uses: HTTP Request, Code. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.