Add README file

plugins/colored-man-pages/README.md

+# Colored man pages plugin
+
+This plugin adds colors to man pages.
+
+To use it, add `colored-man-pages` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... colored-man-pages)
+```
+
+You can also try to color other pages by prefixing the respective command with `colored`:
+
+```zsh
+colored git help clone
+```