Add c++ codes for array data structure.

[Prerna-Bhargava]

Hey, I would like to work on this. Please assign me this issue. I will add C++ code for traversing, insertion, deleting and searching in array.

[nkpal03]

Hei please create your own issue. like which array question you want to solve. I will assign that issue to you and add the required labels also. And also please link the pr with your issue.

Thank you.

[kajaveaniruddha]

Hey @nkpal03 I have solved this issue adding PR right away.

[sabhisharma-ise]

Can you please assign this issue to me?

[Jyotisaini-2001]

Hey @nkpal03 I have solved this issue. And I have added PR also.

[MrJayendra]

I am interested in this work. Please assign it to me.