assistant2: Add create buffer tool (#11219)

This PR adds a new tool to the `assistant2` crate that allows the
assistant to create a new buffer with some content.

Release Notes:

- N/A

---------

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

crates/assistant_tooling/src/registry.rs

@@ -120,8 +120,8 @@ impl ToolRegistry {
 #[cfg(test)]
 mod test {
     use super::*;
-    use gpui::View;
     use gpui::{div, prelude::*, Render, TestAppContext};
+    use gpui::{EmptyView, View};
     use schemars::schema_for;
     use schemars::JsonSchema;
     use serde::{Deserialize, Serialize};
@@ -170,7 +170,7 @@ mod test {
         fn execute(
             &self,
             input: &Self::Input,
-            _cx: &gpui::AppContext,
+            _cx: &mut WindowContext,
         ) -> Task<Result<Self::Output>> {
             let _location = input.location.clone();
             let _unit = input.unit.clone();
@@ -200,6 +200,7 @@ mod test {
     #[gpui::test]
     async fn test_openai_weather_example(cx: &mut TestAppContext) {
         cx.background_executor.run_until_parked();
+        let (_, cx) = cx.add_window_view(|_cx| EmptyView);
 
         let tool = WeatherTool {
             current_weather: WeatherResult {

crates/assistant_tooling/src/tool.rs

@@ -1,5 +1,5 @@
 use anyhow::Result;
-use gpui::{AnyElement, AnyView, AppContext, IntoElement as _, Render, Task, View, WindowContext};
+use gpui::{AnyElement, AnyView, IntoElement as _, Render, Task, View, WindowContext};
 use schemars::{schema::RootSchema, schema_for, JsonSchema};
 use serde::Deserialize;
 use std::fmt::Display;
@@ -94,7 +94,7 @@ pub trait LanguageModelTool {
     }
 
     /// Executes the tool with the given input.
-    fn execute(&self, input: &Self::Input, cx: &AppContext) -> Task<Result<Self::Output>>;
+    fn execute(&self, input: &Self::Input, cx: &mut WindowContext) -> Task<Result<Self::Output>>;
 
     fn format(input: &Self::Input, output: &Result<Self::Output>) -> String;