fix: correct garmin-grafana JSON type and script path

The JSON metadata had type "addon" and script path
"/tools/addon/garmin-grafana.sh", but the actual script has always
lived at ct/garmin-grafana.sh. This caused the website to generate an
installer URL that returns 404.

Changes:
- type: "addon" -> "ct"
- script: "/tools/addon/garmin-grafana.sh" -> "ct/garmin-grafana.sh"
- Move config_path to top level (matching ct JSON convention)
- Fill in resource values from ct/garmin-grafana.sh (cpu: 2, ram: 2048,
  hdd: 8, os: Debian, version: 13)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

json/garmin-grafana.json

@@ -5,25 +5,25 @@
     9
   ],
   "date_created": "2025-05-08",
-  "type": "addon",
+  "type": "ct",
   "updateable": true,
   "privileged": false,
   "interface_port": 3000,
   "documentation": "https://github.com/arpanghosh8453/garmin-grafana",
   "website": "https://github.com/arpanghosh8453/garmin-grafana",
   "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/garmin-grafana.webp",
+  "config_path": "/opt/garmin-grafana/.env",
   "description": "A self-hosted solution to fetch data from Garmin servers and store it in a local InfluxDB database for visualization with Grafana.",
   "install_methods": [
     {
       "type": "default",
-      "script": "/tools/addon/garmin-grafana.sh",
-      "config_path": "/opt/garmin-grafana/.env",
+      "script": "ct/garmin-grafana.sh",
       "resources": {
-        "cpu": null,
-        "ram": null,
-        "hdd": null,
-        "os": null,
-        "version": null
+        "cpu": 2,
+        "ram": 2048,
+        "hdd": 8,
+        "os": "Debian",
+        "version": "13"
       }
     }
   ],