tldrl: add page

pages/common/tldrl.md

@@ -0,0 +1,15 @@
+# tldrl
+
+> Lint and format TLDR pages.
+
+- Lint all pages:
+
+`tldrl {{pages_directory}}`
+
+- Format a specific page to stdout:
+
+`tldrl -f {{page.md}}`
+
+- Format all pages in place:
+
+`tldrl -fi {{pages_directory}}`