Create reverse crosswalks for other frameworks

[funnelfiasco]

Right now, each Baseline control lists corresponding requirements in other frameworks. It would be nice if we did this in reverse: for each of the mapped frameworks, list corresponding Baseline controls.

[eddie-knight]

We should also take advantage of the CRI profile as a reference tool for baseline mappings: https://docs.google.com/spreadsheets/d/1coTZAjVV1uaJ-ErOjJCxDpp0a4tYf73W/edit?gid=1947035433#gid=1947035433