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/kan.json

@@ -1,44 +1,44 @@
 {
-    "name": "Kan",
-    "slug": "kan",
-    "categories": [
-        25
-    ],
-    "date_created": "2026-04-04",
-    "type": "ct",
-    "updateable": true,
-    "privileged": false,
-    "interface_port": 3000,
-    "documentation": "https://github.com/kanbn/kan#readme",
-    "website": "https://kan.bn/",
-    "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/kan.webp",
-    "config_path": "/opt/kan/.env",
-    "description": "Kan is an open-source Kanban board and project management tool built with Next.js and PostgreSQL.",
-    "install_methods": [
-        {
-            "type": "default",
-            "script": "ct/kan.sh",
-            "resources": {
-                "cpu": 4,
-                "ram": 4096,
-                "hdd": 12,
-                "os": "Debian",
-                "version": "13"
-            }
-        }
-    ],
-    "default_credentials": {
-        "username": null,
-        "password": null
+  "name": "Kan",
+  "slug": "kan",
+  "categories": [
+    25
+  ],
+  "date_created": "2026-04-04",
+  "type": "ct",
+  "updateable": true,
+  "privileged": false,
+  "interface_port": 3000,
+  "documentation": "https://github.com/kanbn/kan#readme",
+  "website": "https://kan.bn/",
+  "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/kan.webp",
+  "description": "Kan is an open-source Kanban board and project management tool built with Next.js and PostgreSQL.",
+  "install_methods": [
+    {
+      "type": "default",
+      "script": "ct/kan.sh",
+      "config_path": "/opt/kan/.env",
+      "resources": {
+        "cpu": 4,
+        "ram": 4096,
+        "hdd": 12,
+        "os": "Debian",
+        "version": "13"
+      }
+    }
+  ],
+  "default_credentials": {
+    "username": null,
+    "password": null
+  },
+  "notes": [
+    {
+      "text": "Building from source requires significant resources and may take several minutes.",
+      "type": "warning"
     },
-    "notes": [
-        {
-            "text": "Building from source requires significant resources and may take several minutes.",
-            "type": "warning"
-        },
-        {
-            "text": "Update NEXT_PUBLIC_BASE_URL in /opt/kan/.env if accessing from a different hostname.",
-            "type": "info"
-        }
-    ]
+    {
+      "text": "Update NEXT_PUBLIC_BASE_URL in /opt/kan/.env if accessing from a different hostname.",
+      "type": "info"
+    }
+  ]
 }