Reorganize docker-compose stacks for better service grouping

Stack changes:
- Renamed media-extended.yml → media-management.yml (better clarity)
- Moved Plex from media → alternatives (Jellyfin is primary)
- Moved code-server from utilities → infrastructure
- Moved Sonarr, Radarr, Prowlarr from media → media-management
- Moved Calibre-web from media-management → media

New stack organization:
- media.yml (3): Jellyfin, Calibre-web, qBittorrent
- media-management.yml (13): All *arr apps, transcoders
- alternatives.yml (6): Plex, Portainer, Authentik
- infrastructure.yml (7): Added code-server
- utilities.yml (6): Removed code-server

Documentation updated:
- README.md: Updated stack descriptions
- services-overview.md: Updated service counts and locations
- All service docs: Updated file paths media-extended → media-management

docker-compose/utilities.yml

@@ -59,35 +59,6 @@ services:
       - "traefik.http.routers.duplicati.middlewares=authelia@docker"
       - "traefik.http.services.duplicati.loadbalancer.server.port=8200"
 
-  # Code Server - VS Code in browser
-  # Access at: https://code.${DOMAIN}
-  code-server:
-    image: lscr.io/linuxserver/code-server:latest
-    container_name: code-server
-    restart: unless-stopped
-    networks:
-      - homelab-network
-      - traefik-network
-    volumes:
-      - ./$(basename $file .yml)/config:/config
-      - /opt/stacks:/opt/stacks  # Access to all stacks
-      - /mnt:/mnt:ro  # Read-only access to data
-    environment:
-      - PUID=${PUID:-1000}
-      - PGID=${PGID:-1000}
-      - TZ=${TZ}
-      - PASSWORD=${CODE_SERVER_PASSWORD}
-      - SUDO_PASSWORD=${CODE_SERVER_SUDO_PASSWORD}
-    labels:
-      - "homelab.category=utilities"
-      - "homelab.description=VS Code in browser"
-      - "traefik.enable=true"
-      - "traefik.http.routers.code-server.rule=Host(`code.${DOMAIN}`)"
-      - "traefik.http.routers.code-server.entrypoints=websecure"
-      - "traefik.http.routers.code-server.tls.certresolver=letsencrypt"
-      - "traefik.http.routers.code-server.middlewares=authelia@docker"
-      - "traefik.http.services.code-server.loadbalancer.server.port=8443"
-
   # Form.io - Form builder (if needed)
   # Access at: https://forms.${DOMAIN}
   formio: