newsboat: add page (#4672)

pages/common/newsboat.md

@@ -0,0 +1,20 @@
+# newsboat
+
+> An RSS/Atom feed reader for text terminals.
+> More information: <https://newsboat.org/>.
+
+- First import feed URLs from an OPML file:
+
+`newsboat -i {{my-feeds.xml}}`
+
+- Alternatively, add feeds manually:
+
+`echo {{http://example.com/path/to/feed}} >> "${HOME}/.newsboat/urls"`
+
+- Start newsboat and refresh all feeds on startup:
+
+`newsboat -r`
+
+- See keyboard shortcuts (the most relevant are visible in the status line):
+
+`?`