feat: add support for an InterruptConversation request (#2287)

This adds `ClientRequest::InterruptConversation`, which effectively maps
directly to `Op::Interrupt`.

---

* __->__  #2287
* #2286
* #2285

codex-rs/mcp-server/src/wire_format.rs

@@ -36,7 +36,11 @@ pub enum ClientRequest {
         request_id: RequestId,
         params: SendUserMessageParams,
     },
-
+    InterruptConversation {
+        #[serde(rename = "id")]
+        request_id: RequestId,
+        params: InterruptConversationParams,
+    },
     AddConversationListener {
         #[serde(rename = "id")]
         request_id: RequestId,
@@ -112,6 +116,16 @@ pub struct SendUserMessageParams {
     pub items: Vec<InputItem>,
 }
 
+#[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct InterruptConversationParams {
+    pub conversation_id: ConversationId,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]
+#[serde(rename_all = "camelCase")]
+pub struct InterruptConversationResponse {}
+
 #[derive(Serialize, Deserialize, Debug, Clone, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub struct SendUserMessageResponse {}