Documentation: A "Coming from Perl" section

Related problem

The "Coming from " sections of the Nushell book are a great idea, but there is an obvious "other language" missing- Perl.

As a solution that aims to bridge the gap between shells and programming languages the Pathologically Eclectic Rubbish Lister (PERL) seems to me the natural ancestor/competitor of Nushell. Perl may be long in the tooth but it is still a very widely used tool on Linux / Unix based systems, and has a lot of features designed specifically to make it work well as a "glue" language.

It's not obvious (at least to me as a user new to Nushell) how some of the things Perl can do can be accomplished in Nushell, some specific "getting started" help would be useful.

Describe the solution you'd like

A documentation section on "Coming from Perl" could help open up Nushell to areas where Perl has been the "swiss army knife" of system automation for years.

As an example, it would be particularly helpful to have idiomatic Nushell alternatives for the Perl "special variables" including-

$0    $PROGRAM_NAME        Pathname of the current script
$$    $PID                 The pid of the process running the current script
$^T   $BASETIME            Timestamp when the current process started
$<    $UID                 Real user ID (uid) of this process
$>    $EUID                Effective user ID of this process
$(    $GID                 Real group ID
$)    $EGID                Effective group ID
$!    $ERRNO / $OS_ERROR   Number or text of the error from the last system call
$?    $CHILD_ERROR         Status returned by the last child process

Describe alternatives you've considered

No response

Additional context and details

No response

Inizia individuando le sezioni esistenti "Coming from " del libro di Nushell e leggendone la struttura e gli esempi. Aggiungi una sezione analoga "Coming from Perl" con alternative idiomatiche di Nushell per le variabili speciali di Perl elencate, quindi verifica che sia coerente con lo stile della documentazione e la navigazione del libro.