feat: add full Zonemaster stack with Docker and Spanish UI

- Clone all 5 Zonemaster component repos (LDNS, Engine, CLI, Backend, GUI)
- Dockerfile.backend: 8-stage multi-stage build LDNS→Engine→CLI→Backend
- Dockerfile.gui: Astro static build served via nginx
- docker-compose.yml: backend (internal) + frontend (port 5353)
- nginx.conf: root redirects to /es/, /api/ proxied to backend
- zonemaster-gui/config.ts: defaultLanguage set to 'es' (Spanish)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

zonemaster-engine/lib/Zonemaster/Engine/TestMethods.pm

@@ -0,0 +1,115 @@
+package Zonemaster::Engine::TestMethods;
+
+use v5.16.0;
+use warnings;
+
+use version; our $VERSION = version->declare("v1.0.3");
+
+use List::MoreUtils qw[uniq];
+use Zonemaster::Engine::Util;
+
+sub method1 {
+    my ( $class, $zone ) = @_;
+
+    return $zone->parent;
+}
+
+sub method2 {
+    my ( $class, $zone ) = @_;
+
+    return $zone->glue_names;
+}
+
+sub method3 {
+    my ( $class, $zone ) = @_;
+
+    my @child_nsnames;
+    my @nsnames;
+    my $ns_aref = $zone->query_all( $zone->name, q{NS} );
+    foreach my $p ( @{$ns_aref} ) {
+        next if not $p;
+        push @nsnames, $p->get_records_for_name( q{NS}, $zone->name );
+    }
+    @child_nsnames = uniq map { name( lc( $_->nsdname ) ) } @nsnames;
+
+    return [@child_nsnames];
+}
+
+sub method4 {
+    my ( $class, $zone ) = @_;
+
+    return $zone->glue;
+}
+
+sub method5 {
+    my ( $class, $zone ) = @_;
+
+    return $zone->ns;
+}
+
+sub method2and3 {
+    my ( $class, $zone ) = @_;
+
+    my %union = map { $_->string => $_ } @{ $class->method2( $zone ) }, @{ $class->method3( $zone ) };
+    return [ @union{ sort keys %union } ];
+}
+
+sub method4and5 {
+    my ( $class, $zone ) = @_;
+
+    my %union = map { $_->string => $_ } @{ $class->method4( $zone ) }, @{ $class->method5( $zone ) };
+    return [ @union{ sort keys %union } ];
+}
+
+=head1 NAME
+
+Zonemaster::Engine::TestMethods - Methods common to Test Specification used in test modules
+
+=head1 SYNOPSIS
+
+    my @results = Zonemaster::Engine::TestMethods->method1($zone);
+
+=head1 METHODS
+
+For details on what these methods implement, see the test
+specification documents.
+
+=over
+
+=item method1($zone)
+
+Returns either a Zonemaster::Engine::Zone or undef.
+
+=item method2($zone)
+
+Returns an arrayref of Zonemaster::Engine::DNSName objects.
+
+=item method3($zone)
+
+Returns an arrayref of Zonemaster::Engine::DNSName objects.
+
+=item method4($zone)
+
+Returns something that behaves like an arrayref of Zonemaster::Engine::Nameserver objects.
+
+=item method5($zone)
+
+Returns something that behaves like an arrayref of Zonemaster::Engine::Nameserver objects.
+
+=item method2and3($zone)
+
+Returns the union of Zonemaster::Engine::DNSName objects returned by
+method2($zone) and method3($zone) in a arrayref.
+The elements are sorted according to their string representation.
+
+=item method4and5($zone)
+
+Returns the union of Zonemaster::Engine::Nameserver objects returned by
+method4($zone) and method5($zone) in a arrayref.
+The elements are sorted according to their string representation.
+
+=back
+
+=cut
+
+1;