feedreader: add page (#3218)

pages/linux/feedreader.md

@@ -0,0 +1,23 @@
+# feedreader
+
+> A GUI desktop RSS client. More information: <https://jangernert.github.io/FeedReader/>.
+
+- Print the count of unread articles:
+
+`feedreader --unreadCount`
+
+- Add a URL for a feed to follow:
+
+`feedreader --addFeed={{feed_url}}`
+
+- Grab a specific article using its URL:
+
+`feedreader --grabArticle={{article_url}}`
+
+- Download all images from a specific article:
+
+`feedreader --url={{feed_url}} --grabImages={{article_path}}`
+
+- Play media from a URL:
+
+`feedreader --playMedia={{article_url}}`