added content blocks list helper

[iduuck]

Motivation:
I used the q.contentBlock helper in one of my projects, and spend a lot of time, to debug, why it is telling me, that it is expecting an object, and received an array, until I saw, that contentBlock needs to be used with an array.

This helper helps mitigating this issue.

TODO:

• Helper function
• Test for helper function
• Documentation in README

[gksander]

This is a great idea. I was talking to a colleague the other day that ran into the same problem!

Will you remove the pnpm lock file, and add a small blurb to the README and then tag me in a comment and we can get this merged/released ASAP!

[iduuck]

done @gksander

[gksander]

🚀