hard to customise listings

# User problem

If there is a listing of items such as search results, summary view, etc it's not easy to make simple change to this, such as adding a publish date to each content item listed. The current way would be create a diazo rule to replace the whole listing and rebuild it in rapido. This could be tricky if the search is coming out of collection for example.
# Options
## context arguments

Somehow make it easy to pass in an id or actual object into a rapido block so it can get data out of the and display it in the desired place in the listing.

e.g.

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The issue names no files, tests, or entry points and presents several competing designs for customisable listings. Start by tracing the existing Rapido block and Mosaic tile/listing mechanisms described in the issue, then establish a chosen approach and acceptance criteria for per-item customisation, including how listing brains and object access are handled.

Written by the indexing model from the issue text.