Move pages under tldr, lint run.sh, update docs

tldr/brew-outdated

@@ -0,0 +1,22 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# brew outdated
+
+> List outdated casks and formulae.
+> To upgrade everything, use `brew upgrade`.
+> More information: <https://docs.brew.sh/Manpage#outdated-options-formulacask->.
+
+- List all outdated casks and formulae:
+
+`brew outdated`
+
+- List only outdated formulae:
+
+`brew outdated --formula`
+
+- List only outdated casks:
+
+`brew outdated --cask`