refactor: move config_path from root into install_methods

Migrated all 80 app JSON files to place config_path inside each
install_methods object instead of at the root level. This allows
different install methods (e.g. Debian vs Alpine) to have distinct
config paths.

Also updated AGENTS.md JSON structure example to reflect the change.

json/postiz.json

@@ -1,44 +1,44 @@
 {
-    "name": "Postiz",
-    "slug": "postiz",
-    "categories": [
-        19
-    ],
-    "date_created": "2026-02-22",
-    "type": "ct",
-    "updateable": true,
-    "privileged": false,
-    "interface_port": 80,
-    "documentation": "https://docs.postiz.com/",
-    "website": "https://postiz.com/",
-    "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/postiz.webp",
-    "config_path": "/opt/postiz/.env",
-    "description": "Postiz is an AI-powered social media scheduling tool for managing posts, building audiences, and growing your business across platforms like X, LinkedIn, Instagram, TikTok, Reddit, and more.",
-    "install_methods": [
-        {
-            "type": "default",
-            "script": "ct/postiz.sh",
-            "resources": {
-                "cpu": 4,
-                "ram": 8192,
-                "hdd": 20,
-                "os": "Debian",
-                "version": "13"
-            }
-        }
-    ],
-    "default_credentials": {
-        "username": null,
-        "password": null
+  "name": "Postiz",
+  "slug": "postiz",
+  "categories": [
+    19
+  ],
+  "date_created": "2026-02-22",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "interface_port": 80,
+  "documentation": "https://docs.postiz.com/",
+  "website": "https://postiz.com/",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/postiz.webp",
+  "description": "Postiz is an AI-powered social media scheduling tool for managing posts, building audiences, and growing your business across platforms like X, LinkedIn, Instagram, TikTok, Reddit, and more.",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/postiz.sh",
+      "config_path": "/opt/postiz/.env",
+      "resources": {
+        "cpu": 4,
+        "ram": 8192,
+        "hdd": 20,
+        "os": "Debian",
+        "version": "13"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": [
+    {
+      "text": "The build process requires significant RAM (4GB+). Do not reduce container RAM below 4GB.",
+      "type": "warning"
     },
-    "notes": [
-        {
-            "text": "The build process requires significant RAM (4GB+). Do not reduce container RAM below 4GB.",
-            "type": "warning"
-        },
-        {
-            "text": "NEXT_PUBLIC_* variables are baked at build time. If you change the IP/URL or add social provider keys, rebuild with: postiz-rebuild",
-            "type": "info"
-        }
-    ]
-}
+    {
+      "text": "NEXT_PUBLIC_* variables are baked at build time. If you change the IP/URL or add social provider keys, rebuild with: postiz-rebuild",
+      "type": "info"
+    }
+  ]
+}