should provide data about MMM documents

need to research the latest knesset API and see if there is data about MMM documents, this should be documented in https://github.com/hasadna/knesset-data/tree/master/docs/dataservice

alternatively - look for other sources for MMM data

once we have the documentation of how to get MMM data - can move forward to implement code that fetches it in knesset-data-python

Specifically, we need to get MMM documents related to committee meetings

### related issues
* hasadna/Open-Knesset#566

Start with the docs/dataservice directory and research the latest Knesset API for MMM documents related to committee meetings. If that API lacks the data, investigate other sources. Done means documenting how to obtain the relevant MMM data so implementation in knesset-data-python can follow.

Written by the indexing model from the issue text.