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/t/profiles/profile.json

@@ -0,0 +1,30 @@
+{
+   "net" : {
+      "ipv4" : true,
+      "ipv6" :true 
+   },
+   "no_network" : true,
+   "resolver" : {
+      "defaults" : {
+         "debug" : false,
+         "igntc" : false,
+         "recurse" : false,
+         "retrans" : 3,
+         "retry" : 2,
+         "usevc" :false 
+      }
+   },
+   "logfilter": {
+       "SYSTEM": {
+           "FILTER_THIS": [
+               {
+                   "when": {
+                       "when": 1,
+                       "and": ["this", "or"]
+                   },
+                   "set": "INFO"
+               }
+           ]
+       }
+   }
+}