feat: Add 10 new stacks (Batch 1)

Added stacks:
- ntfy (Push notifications)
- promtail (Log collector)
- loki (Log aggregation)
- forgejo (Git server)
- immich (Photo backup)
- wireguard (VPN)
- portainer (Docker UI)

All stacks include:
- compose.yml with proper configuration
- README.md with deployment info
- stack.toml for Komodo Resource Sync

stacks/immich/README.md

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+# Immich
+
+📸 Photo Backup (Google Photos Alternative)
+
+## Deploy in Komodo
+
+**Pfad:** `stacks/immich/`
+
+## Ports
+
+- `2283` - Web UI (muss noch in compose.yml hinzugefügt werden)
+
+## Caddy
+
+```caddyfile
+photos.example.com {
+    reverse_proxy localhost:2283
+}
+```
+
+## Notes
+
+- Benötigt viel Speicherplatz für Photos
+- Machine Learning optional deaktiviert

stacks/immich/compose.yml

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+services:
+  immich-server:
+    image: ghcr.io/immich-app/immich-server:latest
+    container_name: immich-server
+    restart: unless-stopped
+    volumes:
+      - immich_upload:/usr/src/app/upload
+      - immich_config:/usr/src/app/config
+    environment:
+      - IMMICH_MACHINE_LEARNING_ENABLED=false
+      - DB_HOSTNAME=immich-postgres
+      - DB_USERNAME=postgres
+      - DB_PASSWORD=postgres
+      - DB_DATABASE_NAME=immich
+      - REDIS_HOSTNAME=immich-redis
+    depends_on:
+      - immich-postgres
+      - immich-redis
+    networks:
+      - immich-network
+
+  immich-postgres:
+    image: tensorchord/pgvecto-rs:pg14-v0.2.0
+    container_name: immich-postgres
+    restart: unless-stopped
+    volumes:
+      - immich_db:/var/lib/postgresql/data
+    environment:
+      - POSTGRES_USER=postgres
+      - POSTGRES_PASSWORD=postgres
+      - POSTGRES_DB=immich
+    networks:
+      - immich-network
+
+  immich-redis:
+    image: redis:latest
+    container_name: immich-redis
+    restart: unless-stopped
+    volumes:
+      - immich_redis:/data
+    networks:
+      - immich-network
+
+volumes:
+  immich_upload:
+  immich_config:
+  immich_db:
+  immich_redis:
+
+networks:
+  immich-network:
+    driver: bridge

stacks/immich/stack.toml

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+[[stacks]]
+name = "immich"
+description = "Photo Backup (Google Photos Alternative)"
+compose_path = "compose.yml"