colorls: add page (#7573)

pages/common/colorls.md

@@ -0,0 +1,20 @@
+# colorls
+
+> A Ruby gem that beautifies the terminal's ls command, with color and font-awesome icons.
+> More information: <https://github.com/athityakumar/colorls>.
+
+- List files one per line:
+
+`colorls -1`
+
+- List all files, including hidden files:
+
+`colorls --all`
+
+- Long format list (permissions, ownership, size, and modification date) of all files:
+
+`colorls --long --all`
+
+- Only list directories:
+
+`colorls --dirs`