Fix CivicSignal Research blog Live-previews

[m453h]

Describe the bug
Currently live-previews are not working for components that require pre-processing on getServerSideProps. We need to find a proper way to fix this issue. Two proposed solutions are:

1. Refractor the blockify to make it callable on both client-side and server-side.

2. Use payload's afterRead hook to handle all the data transformation i.e. move the call of the blockify function in this hook .