Added README file to Shutdown or restart mini project

Author: hannahmachado

projects/Shutdown_or_restart_your_device/README.md

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+# Power Options
+<!--Remove the below lines and add yours -->
+This script shuts down or restarts your computer
+
+### Prerequisites
+<!--Remove the below lines and add yours -->
+None
+
+### How to run the script
+<!--Remove the below lines and add yours -->
+Steps on how to run the script along with suitable examples.
+1. Type the following on the command line:
+python PowerOptions.py
+
+2. Press enter and wait for prompt. Type “r” to restart or “s” to shut down
+
+Example:
+python PowerOptions.py 
+Use 'r' for restart and 's' for shutdown: r
+
+### Screenshot/GIF showing the sample use of the script
+<!--Remove the below lines and add yours -->
+python PowerOptions.py
+Use 'r' for restart and 's' for shutdown: r
+
+## *Author Name*
+<!--Remove the below lines and add yours -->
+Hannah Machado 
+