Add comprehensive service stacks: Dockge, Homepage, Home Assistant, and all user services

- Add Dockge to infrastructure (primary over Portainer)
- Create dashboards.yml with Homepage and Homarr (AI-configurable)
- Create homeassistant.yml with HA, ESPHome, TasmoAdmin, Node-RED, Mosquitto, Zigbee2MQTT, MotionEye
- Create media-extended.yml with Readarr, Lidarr, Lazy Librarian, Mylar3, Calibre-Web, Jellyseerr, FlareSolverr, Tdarr, Unmanic
- Create productivity.yml with Nextcloud, Mealie, WordPress, Gitea, DokuWiki, BookStack, MediaWiki (all with databases)
- Create utilities.yml with Backrest, Duplicati, Uptime Kuma, Code Server, Form.io, Authelia Redis
- Add Homepage configuration templates (services.yaml, docker.yaml, settings.yaml, widgets.yaml)
  - All services include container names for Docker integration
  - Widgets configured for services that support them (Sonarr, Radarr, Plex, Jellyfin, etc.)
  - Organized by category with proper layouts
- Create docs/proxying-external-hosts.md - comprehensive guide for proxying Raspberry Pi and other external hosts via Traefik
- Update .env.example with all new service credentials and Homepage API keys
- Update infrastructure.yml to prioritize Dockge, add Dozzle, Glances, Docker Proxy
- All services configured with /opt/stacks paths, Traefik labels, and appropriate Authelia middleware

Co-authored-by: kelinfoxy <67766943+kelinfoxy@users.noreply.github.com>

config-templates/homepage/settings.yaml

@@ -0,0 +1,63 @@
+# Homepage Configuration - Settings
+# Copy to /opt/stacks/homepage/config/settings.yaml
+
+---
+title: Homelab Dashboard
+background: https://images.unsplash.com/photo-1558591710-4b4a1ae0f04d
+backgroundOpacity: 0.2
+theme: dark
+color: slate
+headerStyle: boxed
+hideVersion: true
+hideErrors: false
+showStats: true
+target: _self  # Open links in same tab
+
+# Layout configuration
+layout:
+  Infrastructure:
+    style: row
+    columns: 4
+  Dashboards:
+    style: row
+    columns: 2
+  Media Streaming:
+    style: row
+    columns: 3
+  Media Management:
+    style: row
+    columns: 4
+  Downloads:
+    style: row
+    columns: 2
+  Books & Comics:
+    style: row
+    columns: 3
+  Home Automation:
+    style: row
+    columns: 4
+  Productivity:
+    style: row
+    columns: 4
+  Documentation:
+    style: row
+    columns: 4
+  Backups & Tools:
+    style: row
+    columns: 2
+  Monitoring:
+    style: row
+    columns: 3
+
+# Quick search
+quicklaunch:
+  searchDescriptions: true
+  hideInternetSearch: false
+  showSearchSuggestions: true
+
+# Providers for additional functionality
+providers:
+  longhorn:
+    url: http://longhorn:9500
+  openweathermap: {{HOMEPAGE_VAR_OPENWEATHER_KEY}}
+  weatherapi: {{HOMEPAGE_VAR_WEATHERAPI_KEY}}