Link to cookbook's Halogen Examples ported recipes

[JordanMartinez]

See miles' comment about linking to the cookbook's recipes since we ported the Halogen examples to a Hooks version there.

[thomashoneyman]

I’m happy to add a link in this project to the cookbook recipes for Hooks. I think it would make sense in the main README, the examples README, and the beginning of the docs.

Something like:

To see more examples of Hooks in action, see the PureScript Cookbook’s recipes for Halogen Hooks