+custom rss module

When using the inbuilt RSS module, this becomes my personal config for
that module.

However, when not using that and instead using the newsticker inbuilt
for Emacs, I've got a config for that as well.

Doom/.doom.d/modules/private/rss/packages.el

@@ -0,0 +1,4 @@
+;; -*- no-byte-compile: t; -*-
+;;; private/rss/packages.el
+
+(package! elfeed)