make a new product assignment page

During the Stockholm meeting, the TPA team identified there were many sources of "service lists" in the wiki (and elsewhere). As part of legacy/trac#31261 (moved), some work was done to clean that up. One of the pages that remained after the work is this one:

https://trac.torproject.org/projects/tor/wiki/org/operations/ProductsandAssignments

Apparently, this could be covered by the new developer website, and I was told to open a ticket to track that work.

So basically, I think the job is to convert the above wiki page into something in the new developer website.