Add Basic JavaScript Questions

[Swap76]

Add Basic JavaScript questions in docs/exercise/JavaScript_Basic

This questions should help others to test their skills

For contents in JavaScript_Basic you can check all the topics from docs/JavaScript_Basics

[samisafatli]

Hello, I'm gonna tackle this one, is it closed already?
If not, should I insert the questions inside the Exercise-1.md?

[arthursvpb]

Did it. #216