pages.it/*: update path placeholders and "directory" translations (#9031)

- Replace "al" -> "del", "alla" -> "della", etc. in command paths
- Replace all instances of "cartella" with "directory"
- Update contributing-guides/translation-templates/common-arguments.md to
  reflect these changes

Co-authored-by: marchersimon <50295997+marchersimon@users.noreply.github.com>
Co-authored-by: Marco Bonelli <marco@mebeim.net>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages.it/common/asar.md

@@ -3,9 +3,9 @@
 > Gestore di archivi per la piattaforma Electron.
 > Maggiori informazioni: <https://github.com/electron/asar>.
 
-- Archivia un file o una cartella:
+- Archivia un file o una directory:
 
-`asar pack {{percorso/al/file}} {{archivio.asar}}`
+`asar pack {{percorso/del/file}} {{archivio.asar}}`
 
 - Estrai un archivio: