Add dev stacks

stacks/network-mcp/.env.example

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+ES_URL=http://elasticsearch:9200
+# Elasticsearch API Key authentication (preferred over user/pass)
+ES_API_ID=
+ES_API_KEY=
+
+# Or, Elasticsearch Basic authentication (if no API key)
+# ES_USER=elastic
+# ES_PASS=changeme
+ES_VERIFY_SSL=false
+
+OPNSENSE_URL=https://192.168.1.1
+OPNSENSE_API_KEY=your_key
+OPNSENSE_API_SECRET=your_secret
+
+COLLECTOR_INTERVAL_SECONDS=60
+
+NMAP_INTERVAL_SECONDS=300
+NMAP_PORT_RANGE=1-1024
+NMAP_BATCH_SIZE=10
+NMAP_DISCOVERY_ENABLED=true
+NMAP_DISCOVERY_INTERVAL_SECONDS=3600
+NMAP_DISCOVERY_VLANS=
+NMAP_DISCOVERY_EXTRA_ARGS="-sn -n"
+NMAP_QUICK_BATCH_SIZE=30
+NMAP_QUICK_EXTRA_ARGS="-sS --top-ports 100 -T4 --open -Pn"
+NMAP_FULL_INTERVAL_SECONDS=86400