Use tool calling instead of XML parsing to generate edit operations (#15385)

Release Notes:

- N/A

---------

Co-authored-by: Nathan <nathan@zed.dev>

crates/language_model/src/provider/open_ai.rs

@@ -9,7 +9,7 @@ use gpui::{
 use http_client::HttpClient;
 use open_ai::stream_completion;
 use settings::{Settings, SettingsStore};
-use std::{sync::Arc, time::Duration};
+use std::{future, sync::Arc, time::Duration};
 use strum::IntoEnumIterator;
 use theme::ThemeSettings;
 use ui::prelude::*;
@@ -225,6 +225,17 @@ impl LanguageModel for OpenAiLanguageModel {
         }
         .boxed()
     }
+
+    fn use_tool(
+        &self,
+        _request: LanguageModelRequest,
+        _name: String,
+        _description: String,
+        _schema: serde_json::Value,
+        _cx: &AsyncAppContext,
+    ) -> BoxFuture<'static, Result<serde_json::Value>> {
+        future::ready(Err(anyhow!("not implemented"))).boxed()
+    }
 }
 
 pub fn count_open_ai_tokens(