Notify about broken task file contents (#27185)

Closes https://github.com/zed-industries/zed/issues/23783


https://github.com/user-attachments/assets/df019f68-a76b-4953-967a-a35ed21206ab

Release Notes:

- Added notifications when invalid tasks.json/debug.json is saved

crates/remote_server/src/headless_project.rs

@@ -140,7 +140,6 @@ impl HeadlessProject {
 
         let task_store = cx.new(|cx| {
             let mut task_store = TaskStore::local(
-                fs.clone(),
                 buffer_store.downgrade(),
                 worktree_store.clone(),
                 toolchain_store.read(cx).as_language_toolchain_store(),