Implement insertion sort in javascript

[shaileshthakur1]

This issue is about [Algo/DS Name/Question Name](link to resource for the Algo/DS/Question)

• ✅ I searched or browsed the repo’s other issues to ensure this is not a duplicate

• ✅ Issue Title is in form [Algo/DS Name] in [Language] (ex:- BubbleSort in Java)

• ✅ I will send my PR only after I'm assigned to this issue by any maintainer

• ✅ Assign this issue to me (I want to work on this)

• ✅I ensure that I am not already assigned to 2 or more issues

[Prathamesh-510]

@shaileshthakur1 @sobhanbera Please assign me this issue

[sobhanbera]

@Prathamesh-510 Assigned the issue to you! Start working on it! If needed any help do tell me!