Add example to sqlite recipe

[goodthinkingdavid]

Page URL

https://docs.flutter.dev/cookbook/persistence/sqlite

Page source

https://github.com/flutter/website/blob/main/src/content/cookbook/persistence/sqlite.md

Describe the problem

A tutorial on use of an interface to a relational database should ideally illustrate how to use a relation between tables.

Expected fix

Add a simple example of a table of dog breeds and add a field relating a dog to a breed, for example.

Additional context

No response

I would like to fix this problem.

• I will try and fix this problem on docs.flutter.dev.

[sfshaza2]

Fixed: #13309