added script-no-first-blank-line option

[azimonti]

Added a new option that is leaving unchanged the first line after script so that

  <script>

  if ('serviceWorker' in navigator) {
    navigator.serviceWorker.register('/service-worker.min.js', { scope: '/' })
        .catch(error => console.error('Service Worker registration failed:', error));
  }
  </script>

is not becoming (if tidy is called in-place 3 times)

  <script>




  if ('serviceWorker' in navigator) {
    navigator.serviceWorker.register('/service-worker.min.js', { scope: '/' })
        .catch(error => console.error('Service Worker registration failed:', error));
  }
  </script>

--script-no-first-blank-line is set to no by default (i.e. not changing the current behavior).

If I need to add test or any translation / file, please let me know.