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-cli/Makefile.PL

@@ -0,0 +1,76 @@
+use 5.014002;
+use strict;
+use warnings FATAL => 'all';
+use inc::Module::Install;
+
+use ExtUtils::MakeMaker ();
+
+name 'Zonemaster-CLI';
+all_from 'lib/Zonemaster/CLI.pm';
+resources(
+    repository => 'https://github.com/zonemaster/zonemaster-cli',
+    bugtracker => 'https://github.com/zonemaster/zonemaster-cli/issues',
+);
+
+tests_recursive( 't' );
+
+# "2.1.0" could be declared as "2.001" but not as "2.1"
+# (see Zonemaster::LDNS below)
+
+requires(
+    'Readonly'           => 0,
+    'Net::IP::XS'        => 0,
+    'JSON::XS'           => 0,
+    'Locale::TextDomain' => 1.23,
+    'Try::Tiny'          => 0,
+    'Zonemaster::LDNS'   => 5.000001,  # v5.0.1
+    'Zonemaster::Engine' => 8.001000,  # v8.1.0
+);
+
+test_requires(
+    'JSON::Validator'   => 0,
+    'Test::Differences' => 0,
+);
+
+# Make all platforms include inc/Module/Install/External.pm
+requires_external_bin 'find';
+if ($^O eq "freebsd") {
+    requires_external_bin 'gmake';
+};
+
+sub MY::postamble {
+    my $pure_all;
+    my $sharemakefile = 'share/GNUmakefile';
+    if ($^O eq "freebsd") {
+        # Make FreeBSD use gmake for share
+        $pure_all = "GMAKE ?= \"gmake\"\n"
+            . "pure_all :: $sharemakefile\n"
+            . "\tcd share && \$(GMAKE) all\n";
+    } else {
+        # Here Linux and GNU Make is assumed
+        $pure_all = "pure_all :: $sharemakefile\n"
+            . "\tcd share && \$(MAKE) all\n";
+    };
+
+    my $docker = <<'END_DOCKER';
+
+docker-build:
+	docker build --tag zonemaster/cli:local --build-arg version=$(VERSION) .
+
+docker-tag-version:
+	docker tag zonemaster/cli:local zonemaster/cli:$(VERSION)
+
+docker-tag-latest:
+	docker tag zonemaster/cli:local zonemaster/cli:latest
+
+END_DOCKER
+
+    return $pure_all . $docker;
+};
+
+
+
+install_script 'zonemaster-cli';
+install_share;
+
+WriteAll;