Port some more tools to agent2 (#35973)

Release Notes:

- N/A

crates/agent2/src/tools/create_directory_tool.rs

@@ -0,0 +1,89 @@
+use agent_client_protocol::ToolKind;
+use anyhow::{Context as _, Result, anyhow};
+use gpui::{App, Entity, SharedString, Task};
+use project::Project;
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+use std::sync::Arc;
+use util::markdown::MarkdownInlineCode;
+
+use crate::{AgentTool, ToolCallEventStream};
+
+/// Creates a new directory at the specified path within the project. Returns
+/// confirmation that the directory was created.
+///
+/// This tool creates a directory and all necessary parent directories (similar
+/// to `mkdir -p`). It should be used whenever you need to create new
+/// directories within the project.
+#[derive(Debug, Serialize, Deserialize, JsonSchema)]
+pub struct CreateDirectoryToolInput {
+    /// The path of the new directory.
+    ///
+    /// <example>
+    /// If the project has the following structure:
+    ///
+    /// - directory1/
+    /// - directory2/
+    ///
+    /// You can create a new directory by providing a path of "directory1/new_directory"
+    /// </example>
+    pub path: String,
+}
+
+pub struct CreateDirectoryTool {
+    project: Entity<Project>,
+}
+
+impl CreateDirectoryTool {
+    pub fn new(project: Entity<Project>) -> Self {
+        Self { project }
+    }
+}
+
+impl AgentTool for CreateDirectoryTool {
+    type Input = CreateDirectoryToolInput;
+    type Output = String;
+
+    fn name(&self) -> SharedString {
+        "create_directory".into()
+    }
+
+    fn kind(&self) -> ToolKind {
+        ToolKind::Read
+    }
+
+    fn initial_title(&self, input: Result<Self::Input, serde_json::Value>) -> SharedString {
+        if let Ok(input) = input {
+            format!("Create directory {}", MarkdownInlineCode(&input.path)).into()
+        } else {
+            "Create directory".into()
+        }
+    }
+
+    fn run(
+        self: Arc<Self>,
+        input: Self::Input,
+        _event_stream: ToolCallEventStream,
+        cx: &mut App,
+    ) -> Task<Result<Self::Output>> {
+        let project_path = match self.project.read(cx).find_project_path(&input.path, cx) {
+            Some(project_path) => project_path,
+            None => {
+                return Task::ready(Err(anyhow!("Path to create was outside the project")));
+            }
+        };
+        let destination_path: Arc<str> = input.path.as_str().into();
+
+        let create_entry = self.project.update(cx, |project, cx| {
+            project.create_entry(project_path.clone(), true, cx)
+        });
+
+        cx.spawn(async move |_cx| {
+            create_entry
+                .await
+                .with_context(|| format!("Creating directory {destination_path}"))?;
+
+            Ok(format!("Created directory {destination_path}"))
+        })
+    }
+}