Migration of all toasts to a common widget

[utkarshshendge]

• Parent issue : Refactoring of codebase and separation on data/UI #715
• Issue Description:
  Migration of all the success and error toast to a common widget in success_toast.dart
  The widget here needs some modifications to make it universal. Like it needs two required parameters message andisSuccesswith an option parameter duration. After which this widget needs to be used at all the places in the project by just passing the message, isSuccess, and duration if needed. After successfully accomplishing the task the file toast_tile.dart can be deleted with the file success_toast.dart renamed to something more appropriate liketoast.dartetc.
• Issue Severity:
  Low
• Environment Details:
  Project Level
• Observed Behaviour:
  Toasts are coded multiple times, can be moved to single file
• Expected Behaviour:
  Removal of unused widgets, unused files. Generation of reusable widgets
• Does this issue need immediate attention?
  No
• Please ask mentors/maintainers to assign if you are willing to work on this issue.

[utkarshshendge]

I would like to work on this.

[palisadoes]

Issue #700 has now been integrated into the pull request process. It will flag all Dart files that are longer than 300 lines to help with readability. Please make sure your contribution reduces file sizes to within this limit.