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 :)

### Breakdown

### Related files

Refer to [this map of common Endpoints](https://github.com/internetarchive/openlibrary/wiki/Endpoints):
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### Requirements Checklist
Checklist of requirements that need to be satisfied in order for this issue to be closed:
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### Stakeholders

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