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

tldr/banner

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# banner
+
+> Print the argument as a large ASCII art.
+> More information: <https://manned.org/banner>.
+
+- Print the text message as a large banner (quotes are optional):
+
+`banner "{{Hello World}}"`
+
+- Use a banner [w]idth of 50 characters:
+
+`banner -w 50 "{{Hello World}}"`
+
+- Read text from `stdin`:
+
+`banner`