feat: add Skyreader

pkg/apps.go

···
 		NSID:        "garden.goals",
 		Label:       "garden-goals",
 	},
+	{
+		Name:        "Skyreader",
+		Description: "RSS Reader on ATProto",
+		NSID:        "app.skyreader",
+		Label:       "app-skyreader",
+	},
 }