Terminal tool improvements (#29924)

WIP

- On macOS/Linux, run the command in bash instead of the user's shell
- Try to prevent the agent from running commands that expect interaction

Release Notes:

- Agent Beta: Switched to using `bash` (if available) instead of the
user's shell when calling the terminal tool.
- Agent Beta: Prevented the agent from hanging when trying to run
interactive commands.

---------

Co-authored-by: WeetHet <stas.ale66@gmail.com>

crates/assistant_tools/src/assistant_tools.rs

@@ -61,7 +61,7 @@ pub fn init(http_client: Arc<HttpClientWithUrl>, cx: &mut App) {
     assistant_tool::init(cx);
 
     let registry = ToolRegistry::global(cx);
-    registry.register_tool(TerminalTool);
+    registry.register_tool(TerminalTool::new(cx));
     registry.register_tool(CreateDirectoryTool);
     registry.register_tool(CopyPathTool);
     registry.register_tool(DeletePathTool);