feat: delete user by email

How this should be manually tested

Ensure the user is authenticated and authorized to delete an account.
Access the route as an authenticated user (ROLE_SUPER_ADMIN).
Send a DELETE request to /api/v1/users/delete with the following request body to delete a user by their email:

{
    "email": "user.email@example.com"
}

{
    "status_code": "success",
    "message": "The account has been successfully deleted."
}

{
    "status_code": "404",
    "message": "User not found with email: user.email@example.com"
}

{
    "status_code": "400",
    "message": "Bad Request. The email field is required."
}

[ ] Implemented the DELETE /api/v1/users/delete endpoint to delete a user by email.
[ ] Added validation to ensure the email field is provided and is not empty.
[ ] Checked if the user exists by their email and handled cases where the user does not exist.
[ ] Implemented error handling to return appropriate status codes and messages.
[ ] Wrote unit tests to validate the service logic for various scenarios (successful deletion, user not found, bad request).