Add AdGuard Home blueprint with Docker Compose and metadata

- Introduced AdGuard Home entry in meta.json with detailed description, logo, and relevant links.
- Added Docker Compose configuration for AdGuard Home service.
- Created template.toml for AdGuard Home configuration with default variables.

blueprints/adguardhome/docker-compose.yml

@@ -0,0 +1,21 @@
+version: "3.8"
+services:
+  adguardhome:
+    image: adguard/adguardhome:latest
+    restart: unless-stopped
+    ports:
+      - "53:53/tcp"
+      - "53:53/udp"
+      - "784:784/udp"
+      - "853:853/tcp"
+      - "853:853/udp"
+      - "8853:8853/udp"
+      - "5443:5443/tcp"
+      - "5443:5443/udp"
+    volumes:
+      - adguardhome-work:/opt/adguardhome/work
+      - adguardhome-conf:/opt/adguardhome/conf
+
+volumes:
+  adguardhome-work: {}
+  adguardhome-conf: {}