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-backend/MANIFEST

@@ -0,0 +1,93 @@
+Changes
+CONTRIBUTING.md
+docs/Architecture.md
+docs/files-description.md
+docs/TypographicConventions.md
+inc/Module/Install.pm
+inc/Module/Install/Base.pm
+inc/Module/Install/Can.pm
+inc/Module/Install/External.pm
+inc/Module/Install/Fetch.pm
+inc/Module/Install/Makefile.pm
+inc/Module/Install/Metadata.pm
+inc/Module/Install/Scripts.pm
+inc/Module/Install/Share.pm
+inc/Module/Install/Win32.pm
+inc/Module/Install/WriteAll.pm
+lib/Zonemaster/Backend.pm
+lib/Zonemaster/Backend/Config.pm
+lib/Zonemaster/Backend/Config/DCPlugin.pm
+lib/Zonemaster/Backend/DB.pm
+lib/Zonemaster/Backend/DB/MySQL.pm
+lib/Zonemaster/Backend/DB/PostgreSQL.pm
+lib/Zonemaster/Backend/DB/SQLite.pm
+lib/Zonemaster/Backend/Errors.pm
+lib/Zonemaster/Backend/Log.pm
+lib/Zonemaster/Backend/Metrics.pm
+lib/Zonemaster/Backend/RPCAPI.pm
+lib/Zonemaster/Backend/TestAgent.pm
+lib/Zonemaster/Backend/Translator.pm
+lib/Zonemaster/Backend/Validator.pm
+LICENSE
+Makefile.PL
+MANIFEST			This list of files
+META.yml
+README.md
+script/add-batch-job.pl
+script/zmb
+script/zmtest
+script/zonemaster_backend_rpcapi.psgi
+script/zonemaster_backend_testagent
+share/backend_config.ini
+share/cleanup-mysql.sql
+share/cleanup-postgres.sql
+share/create_db.pl
+share/freebsd-pwd.conf
+share/GNUmakefile
+share/locale/da/LC_MESSAGES/Zonemaster-Backend.mo
+share/locale/es/LC_MESSAGES/Zonemaster-Backend.mo
+share/locale/fi/LC_MESSAGES/Zonemaster-Backend.mo
+share/locale/fr/LC_MESSAGES/Zonemaster-Backend.mo
+share/locale/nb/LC_MESSAGES/Zonemaster-Backend.mo
+share/locale/sl/LC_MESSAGES/Zonemaster-Backend.mo
+share/locale/sv/LC_MESSAGES/Zonemaster-Backend.mo
+share/Makefile
+share/patch/patch_db_zonemaster_backend_ver_11.1.0.pl
+share/patch/patch_db_zonemaster_backend_ver_11.2.0.pl
+share/patch/patch_db_zonemaster_backend_ver_9.0.0.pl
+share/patch/patch_mysql_db_zonemaster_backend_ver_1.0.3.pl
+share/patch/patch_mysql_db_zonemaster_backend_ver_5.0.0.pl
+share/patch/patch_mysql_db_zonemaster_backend_ver_5.0.2.pl
+share/patch/patch_mysql_db_zonemaster_backend_ver_8.0.0.pl
+share/patch/patch_postgresql_db_zonemaster_backend_ver_1.0.3.pl
+share/patch/patch_postgresql_db_zonemaster_backend_ver_5.0.0.pl
+share/patch/patch_postgresql_db_zonemaster_backend_ver_8.0.0.pl
+share/patch/patch_sqlite_db_zonemaster_backend_ver_8.0.0.pl
+share/patch/README.txt
+share/tmpfiles.conf
+share/zm-rpcapi.lsb
+share/zm-rpcapi.service
+share/zm-testagent.lsb
+share/zm-testagent.service
+share/zm_rpcapi-bsd
+share/zm_testagent-bsd
+t/00-load.t
+t/batches.t
+t/config.t
+t/db.t
+t/db_ddl.t
+t/idn.data
+t/idn.t
+t/lifecycle.t
+t/parameters_validation.t
+t/queue.t
+t/rpc_validation.t
+t/test01.data
+t/test01.t
+t/test_profile.json
+t/test_profile_network_true.json
+t/test_profile_no_network.json
+t/test_validate_syntax.t
+t/TestUtil.pm
+t/translator.t
+t/validator.t