Add missing concepts of JavaScript Basics

[Swap76]

Please have a look at the repo in the JavaScript_Basics folder if you know any concept that is missing comment here I will create a separate issue for tracking the progress of it.

Also, you can add the docs for the same concept in docs/JavaScript_Basics

[lnchapin]

I'm working on one going over the various types of loops, I saw we have one for looping over objects but have skipped over for loops, do whiles, whiles, etc.

[Swap76]

@lnchapin Go ahead with it

[nishant-sethi]

@Swap76 I can look into this one.

[Swap76]

@nishant-sethi Cool let know the missing stuff then I will create an issue for you to start working on it and for keeping track of things

[yohan-choi-dev]

@Swap76 There is no try and catch, I will add error handling part

[Swap76]

@cyh0968 Cool. Looking Forward to the PR :-)