Added FareEstimation Feature and Integrated it with Backend

[AnshikaRathour]

All Submissions:

• Have you followed the guidelines stated in [README.md](https://github.com/visheshrwl/Uber-like/tree
  /main#how-to-contribute) file?
• Have you checked to ensure there aren't any other open Pull Requests for the desired changed?

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

After these steps, you're ready to open a pull request.

a. Give a descriptive title to your PR.

 Added FareEstimation Feature and Integrated it with Backend

b. Describe your changes.

The fare can now be easily estimated based on various inputs and is fully integrated with the backend.
c. Put closes #40