Add pipeline for testing documentation

We have a test procedure that is run against the TPs to check if it is possible to generate the DOCX out of it.

If it fails, it means that something in wrong either in the TPs or in the python scripts and that it would be not possible to obtain a proper DOCX.

The idea is to run this logic when pushing on develop and in merge requests as a CI/CD pipeline in order to notify the user that there is something wrong in their commits (i.e. a documentation file is missing, a python script was not updated accordingly etc).