feat(app-server): update remote control APIs for better UX (#22877)

## Why
To help improve `codex remote-control` CLI UX which I plan to do in a
followup, this PR adds `server-name` to the various remote control APIs:
- `remoteControl/enable`
- `remoteControl/disable`
- `remoteControl/status/changed`

Also, add a `remoteControl/status/read` API. This will be helpful in the
Codex App.

codex-rs/app-server-protocol/schema/json/ServerNotification.json

@@ -2748,12 +2748,16 @@
         "installationId": {
           "type": "string"
         },
+        "serverName": {
+          "type": "string"
+        },
         "status": {
           "$ref": "#/definitions/RemoteControlConnectionStatus"
         }
       },
       "required": [
         "installationId",
+        "serverName",
         "status"
       ],
       "type": "object"

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

@@ -13446,12 +13446,16 @@
           "installationId": {
             "type": "string"
           },
+          "serverName": {
+            "type": "string"
+          },
           "status": {
             "$ref": "#/definitions/v2/RemoteControlConnectionStatus"
           }
         },
         "required": [
           "installationId",
+          "serverName",
           "status"
         ],
         "title": "RemoteControlStatusChangedNotification",

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json

@@ -9995,12 +9995,16 @@
         "installationId": {
           "type": "string"
         },
+        "serverName": {
+          "type": "string"
+        },
         "status": {
           "$ref": "#/definitions/RemoteControlConnectionStatus"
         }
       },
       "required": [
         "installationId",
+        "serverName",
         "status"
       ],
       "title": "RemoteControlStatusChangedNotification",

codex-rs/app-server-protocol/schema/json/v2/RemoteControlStatusChangedNotification.json

@@ -22,12 +22,16 @@
     "installationId": {
       "type": "string"
     },
+    "serverName": {
+      "type": "string"
+    },
     "status": {
       "$ref": "#/definitions/RemoteControlConnectionStatus"
     }
   },
   "required": [
     "installationId",
+    "serverName",
     "status"
   ],
   "title": "RemoteControlStatusChangedNotification",

codex-rs/app-server-protocol/schema/typescript/v2/RemoteControlStatusChangedNotification.ts

@@ -6,4 +6,4 @@ import type { RemoteControlConnectionStatus } from "./RemoteControlConnectionSta
 /**
  * Current remote-control connection status and remote identity exposed to clients.
  */
-export type RemoteControlStatusChangedNotification = { status: RemoteControlConnectionStatus, installationId: string, environmentId: string | null, };
+export type RemoteControlStatusChangedNotification = { status: RemoteControlConnectionStatus, serverName: string, installationId: string, environmentId: string | null, };