Create a script to automatically generate media properties

[obulat]

Problem

This is the first part of the Documenting Media Properties in the Catalog project.

Description

Create the script that parses SQL DDLs and Python column definition files to generate the markdown file for the documentation site.

Doing steps 1 and 2 from the implementation plan in the same PR will make testing this much easier: you would just invoke the just script to run the documentation generation.