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.

meta.json

@@ -1,4 +1,22 @@
 [
+  {
+    "id": "adguardhome",
+    "name": "AdGuard Home",
+    "version": "latest",
+    "description": "AdGuard Home is a comprehensive solution designed to enhance your online browsing experience by eliminating all kinds of ads, from annoying banners and pop-ups to intrusive video ads. It provides privacy protection, browsing security, and parental control features while maintaining website functionality.",
+    "logo": "logo.svg",
+    "links": {
+      "github": "https://github.com/AdguardTeam/AdGuardHome",
+      "website": "https://adguard.com",
+      "docs": "https://github.com/AdguardTeam/AdGuardHome/wiki"
+    },
+    "tags": [
+      "privacy",
+      "security",
+      "dns",
+      "ad-blocking"
+    ]
+  },
   {
     "id": "appwrite",
     "name": "Appwrite",