Show how to build value-based JSON codecs for multiple records that share common fields

**Recipe Name**

```
ValueBasedJsonCodecSharedRecordFieldLog
```

**Recipe Description**

Just demonstrate what I have done [here](https://try.purescript.org/?gist=54cd7a2586d9cba35a2ebfa25f930b42) (as a solution to garyb/purescript-codec-argonaut#41) so it's easier to find later.
