Add app configs to config.toml (#10822)

Adds app configs to config.toml + tests

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json

@@ -9825,6 +9825,32 @@
         },
         "type": "object"
       },
+      "AppConfig": {
+        "properties": {
+          "disabled_reason": {
+            "anyOf": [
+              {
+                "$ref": "#/definitions/v2/AppDisabledReason"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "enabled": {
+            "default": true,
+            "type": "boolean"
+          }
+        },
+        "type": "object"
+      },
+      "AppDisabledReason": {
+        "enum": [
+          "unknown",
+          "user"
+        ],
+        "type": "string"
+      },
       "AppInfo": {
         "properties": {
           "description": {
@@ -9874,6 +9900,9 @@
         ],
         "type": "object"
       },
+      "AppsConfig": {
+        "type": "object"
+      },
       "AppsListParams": {
         "$schema": "http://json-schema.org/draft-07/schema#",
         "properties": {
@@ -10489,6 +10518,17 @@
               }
             ]
           },
+          "apps": {
+            "anyOf": [
+              {
+                "$ref": "#/definitions/v2/AppsConfig"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "default": null
+          },
           "compact_prompt": {
             "type": [
               "string",