Re-enable directory-related tools (#29809)

Also `now` in `write` profile

Release Notes:

- Tools for manipulating directories no longer require confirmation, and
are enabled in the Write profile
- Enabled `now` and `list_directory` tools by default in Write profile

---------

Co-authored-by: Cole Miller <m@cole-miller.net>
Co-authored-by: Cole Miller <cole@zed.dev>

crates/assistant_tools/src/delete_path_tool.rs

@@ -34,7 +34,7 @@ impl Tool for DeletePathTool {
     }
 
     fn needs_confirmation(&self, _: &serde_json::Value, _: &App) -> bool {
-        true
+        false
     }
 
     fn description(&self) -> String {