Include Golang challenges

[jamesgeorge007]

Include challenges for Golang by which the users can familiarise themselves with the basic language constructs.

[perkinsjr]

@jamesgeorge007 I will start writing up Go challenges , you can assign to me if you would like

[jamesgeorge007]

@perkinsjr sure, go on 👍

[jamesgeorge007]

@perkinsjr friendly ping.