Running and testing the solution

[asadsid95]

Re: #7

Description: Able to run and test my code for correctness and efficiency (in comparison to optimal answer) for the solution

Details:

• playground's half containing code editor and test cases should have button: 'Run'
• event listener on 'Run' button to test the code for correctness
• Result should appear in Console (this includes errors, logs, etc.)
• Enable to authenticated users only