[recursive.sh]: add recursive.sh

A script that calls itself

README.md

@@ -3,4 +3,5 @@ This repository was created as a sister repository to the more practical [`utili
 repository to house scripts that were not useful enough to earn a place in there.
 
 ## Overview of Scripts
+ - `recursive.sh`: a script that calls itself
  - `suicidal_script.sh`: a script that deletes itself.

recursive.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+# A script that calls itself
+
+recursion_count=${1:-0}
+echo "Recursion number $recursion_count"
+$0 $((recursion_count + 1))