Updating FAQ to multiple MD files

[hydrian]

• Resolves: Add support/documentation on setting up RSS Subscription #2285

Summary

Split old FAQ to multiple targeted MD guides from the omnibus FAQ.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Changelog entry added for all important changes.

[anoymouserver]

Thanks for the PR to make the doc a little clearer.
A few minor things about it:

1. In my opinion, the best place to put the integration guide is under the "features" section.
2. Since you've split the faq.md, the old file should be removed

[hydrian]

1. In my opinion, the best place to put the integration guide is under the "features" section.

Are you just talking about the file or the file and the reference in the root README.md?