Add workspace-owner credit nudge flow to the CLI.

Expose workspace-owner account metadata and an app-server nudge endpoint so users who run out of credits can inspect usage and notify their workspace owner directly from the TUI.

Made-with: Cursor

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

@@ -4538,6 +4538,29 @@
       "title": "Account/rateLimits/readRequest",
       "type": "object"
     },
+    {
+      "properties": {
+        "id": {
+          "$ref": "#/definitions/RequestId"
+        },
+        "method": {
+          "enum": [
+            "account/sendAddCreditsNudgeEmail"
+          ],
+          "title": "Account/sendAddCreditsNudgeEmailRequestMethod",
+          "type": "string"
+        },
+        "params": {
+          "type": "null"
+        }
+      },
+      "required": [
+        "id",
+        "method"
+      ],
+      "title": "Account/sendAddCreditsNudgeEmailRequest",
+      "type": "object"
+    },
     {
       "properties": {
         "id": {