Add section on Debugging a script in the docs?

[Metaxal]

Say that the script's file really is a module, so the script's function can be run in DrRacket's interaction window, and called with 'mock' arguments, and give an example

[Metaxal]

adapted from @spdegabrielle :

#lang racket/base
(require quickscript)
(define-script reverse-selection
  #:label "Reverse"
  #:help-string "reverses the selection"
  (λ (selection)
    (list->string (reverse (string->list selection)))))

(module+ test
  (require rackunit)
  (check-equal? "Welcome Sharon!" (reverse-selection "!norahS emocleW")))