Keep checkboxes with core.itero

[JacobusH]

Issues

• I have checked existing issues and there are no existing ones with the same request.

Feature description

Thanks so much for the core.itero module! It makes working with neorg much smoother.

One extra thing I would ask is for checkboxes to be maintained in the lists.

Current behaviour:

- [x]  (press <M-RET>)
-

Expected behaviour:

- [x] (press <M-RET>)
- [ ]

If you are ok with it working like this I will see about submitting a PR this weekend.

Help

Yes

Implementation help

Just a review of the code and suggestions if it is not the way you want it written.
I have already hacked together some extra functionality for my own use cases.

[vhyrro]

Hey, now with the new syntax out of the question I was finally free to implement it!

[JacobusH]

Oh awesome thank you!