text: Title: Add back to top functionality
  Body: ### Description
  
  As the total height of website is long so back to top button is much needed for easy navigation.
  
  So assign this issue to be under Hacktoberfest.
  
  ### Acceptance Criteria
  
  - [ ] Ensure new code is unit tested, and check code coverage is at least 90%.
  - [ ] Create related issue in taipy-doc for documentation and Release Notes.
  - [ ] Check if a new demo could be provided based on this, or if legacy demos could be benefit from it.
  - [ ] Ensure any change is well documented.
  
  
  ### Code of Conduct
  
  - [X] I have checked the [existing issues](https://github.com/Avaiga/taipy/issues?q=is%3Aissue+).
  - [X] I am willing to work on this issue (optional)