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/widgets.yaml

@@ -0,0 +1,49 @@
+# Homepage Configuration - Widgets
+# Copy to /opt/stacks/homepage/config/widgets.yaml
+# Displays system resources and other information
+
+---
+- logo:
+    icon: https://avatars.githubusercontent.com/u/...  # Your logo here
+
+- search:
+    provider: google
+    target: _blank
+
+- datetime:
+    text_size: xl
+    format:
+      dateStyle: long
+      timeStyle: short
+      hourCycle: h23
+
+- resources:
+    label: System
+    cpu: true
+    memory: true
+    disk: /
+    cputemp: true
+    uptime: true
+    units: metric
+
+- resources:
+    label: Storage
+    disk: /mnt/media
+    expanded: true
+
+- resources:
+    label: Downloads
+    disk: /mnt/downloads
+    expanded: true
+
+- openmeteo:
+    label: Weather
+    latitude: 40.7128
+    longitude: -74.0060
+    units: metric
+    cache: 5
+
+- unifi_console:
+    url: http://unifi:8443
+    username: {{HOMEPAGE_VAR_UNIFI_USER}}
+    password: {{HOMEPAGE_VAR_UNIFI_PASS}}