Add Exercise Questions for Array Methods in JavaScript

[Swapnil Satish Shinde]

Add the Exercise question for Array Method in docs/Exercise/Javascript_Basics/array_method.md which can be solved using JavaScript

The question can be open-ended or a task to complete to learn the concept

[Moises Trigueros]

Hi @Swap76 ,
I would like to work on it. Kindly assign it to me.

Thanks

[Swapnil Satish Shinde]

@MoisesTR Go ahead with it

[Moises Trigueros]

I did the pull request, please tell me if it's ok what I uploaded @Swap76

[Swapnil Satish Shinde]

@MoisesTR Sure