Lint extensions/ and wrap up hanging frontend dirs

fs/, format/ and logseq/ also added to linting by adding todos for later
inspection

src/main/frontend/extensions/pdf/utils.cljs

@@ -165,10 +165,10 @@
   []
   (try
     (js-invoke js/window.lsPdfViewer "nextPage")
-    (catch js/Error e nil)))
+    (catch js/Error _e nil)))
 
 (defn prev-page
   []
   (try
     (js-invoke js/window.lsPdfViewer "previousPage")
-    (catch js/Error e nil)))
+    (catch js/Error _e nil)))