feat: add slow sort algo

[AfaqShuaib09]

This PR adds the Slow Sort Algorithm in javaScript to the repo. Note: This PR also adds the file extension for the bubble sort

Write here what you have changed in codebase

• Javascript
  • slow-sort.js

Issue no.(must) - # https://github.com/Py-Contributors/AlgorithmsAndDataStructure/issues/933

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Self Check(Tick After Making pull Request)

• [x] This issue was assigned to me if not it will marked as spam.
• [x] My file is in proper folder
• [x] I am following clean code and Documentation.My code is well linted and I am using flake8 standard for python
• [x] I have added title and what program will do first in the file

acknowledgment

• [x] I have tested the script and distributed it under an MIT license.

README - How to Contribute

[AfaqShuaib09]

Hey @Kritika30032002 & @codeperfectplus, Could could you guys please review this PR. I have created it for the issue mentioned here: https://github.com/Py-Contributors/AlgorithmsAndDataStructure/issues/933. Thank you!