recommendations: add discovery-feed and newsfeed locations

Summary

(What is the Merge request intending to do, in plain language)

(Be sure to associate any related issues or merge requests)

relates to minds#2926 (closed) and minds#2925 (closed)

Steps to test

(Steps to demonstrate merge achieves goal) (Include any platform specific directions)

Estimated Regression Scope

(What features do these changes effect in your estimation?)