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/.perltidyrc

@@ -0,0 +1,17 @@
+-ole=unix
+-se
+-bext=~
+-l=120
+-i=4
+-ci=2
+-nsbl
+-cti=0
+-pt=0
+-sbt=1
+-bt=1
+-bbt=0
+-sfs
+-tso
+-csc
+-csci=20
+-nbbc