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

tldr/polybar

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# polybar
+
+> A fast and easy-to-use status bar.
+> More information: <https://github.com/polybar/polybar/wiki>.
+
+- Start Polybar (the bar name is optional if only one bar is defined in the config):
+
+`polybar {{bar_name}}`
+
+- Start Polybar with the specified config:
+
+`polybar --config={{path/to/config.ini}} {{bar_name}}`
+
+- Start Polybar and reload the bar when the configuration file is modified:
+
+`polybar --reload {{bar_name}}`