Update bin/administration

Refactor code style: replace tabs with spaces, document new option, and maintain alphabetical order

Co-authored-by: El RIDO <elrido@gmx.net>

bin/administration

@@ -153,7 +153,7 @@ class Administration
     {
         echo <<<'EOT'
 Usage:
-	administration [--delete <paste id> | --empty-dirs | --help | --purge | --statistics | --list-ids]
+  administration [--delete <paste id> | --delete-all | --empty-dirs | --help | --list-ids | --purge | --statistics]
 
 Options:
   -d, --delete      deletes the requested paste ID