Add trending score to the Book Page (if > threshold)

Feature Request

Problem / Opportunity

We recently added trending scores to our solr search engine. This means, when we arrive on the book page, we should have trending score available to us.

Proposal

If the trending score for the book on the book page is > some threshold e.g. 5, then render the trending badge macro.

https://github.com/internetarchive/openlibrary/blob/master/openlibrary/macros/TrendingBadge.html

Please propose a design if you'd like to work on this issue :)

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Requirements Checklist

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