Added Insertion sort in javascript.

[Utkarsh-byte-bot]

Welcome to JavaScript community

Describe your change:

Added Insertion sort in javascript.

• [ Add more algorithms #14 Worked on this issue.. ] Add an algorithm?
• [ Added new algorithm] Fix a bug or typo in an existing algorithm?
• Documentation change?

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• All new JavaScript files are placed inside an existing directory.
• All filenames should use the UpperCamelCase (PascalCase) style. There should be no spaces in filenames.
  Example:UserProfile.js is allowed but userprofile.js,Userprofile.js,user-Profile.js,userProfile.js are not
• All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation.
• If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[marsonya]

Kindly make sure your contribution psses all Checks. Use standard as mentioned in CONTRIBUTING.md.

Quick Fix:- Run standard --fix to automatically fix some problems.

[marsonya]

I think this may be abandoned, but I'll ping one more time, because I think it's great work! @Utkarsh-byte-bot, could you rebase this and fix the errors?

[marsonya]

Please reopen this pull request once you commit the changes requested or make improvements on the code. Thank you for your contributions!