feat: add 18 AI/ML Portainer templates with gap analysis

ai-templates/stacks/n8n-ai/docker-compose.yml

@@ -0,0 +1,20 @@
+version: "3.8"
+
+services:
+  n8n:
+    image: docker.n8n.io/n8nio/n8n:latest
+    container_name: n8n-ai
+    restart: unless-stopped
+    ports:
+      - "${N8N_PORT:-5678}:5678"
+    volumes:
+      - n8n_data:/home/node/.n8n
+    environment:
+      - N8N_BASIC_AUTH_ACTIVE=${N8N_AUTH:-true}
+      - N8N_BASIC_AUTH_USER=${N8N_USER:-admin}
+      - N8N_BASIC_AUTH_PASSWORD=${N8N_PASSWORD:-changeme}
+      - WEBHOOK_URL=${WEBHOOK_URL:-http://localhost:5678/}
+      - N8N_AI_ENABLED=true
+
+volumes:
+  n8n_data: