Keep file permissions when extracting zip archives on Unix (#31304)

Follow-up of https://github.com/zed-industries/zed/pull/31080

Stop doing

```rs
#[cfg(not(windows))]
{
    file.set_permissions(<fs::Permissions as fs::unix::PermissionsExt>::from_mode(
        0o755,
    ))
    .await?;
}
```

after extracting zip archives on Unix, and use an API that provides the
file permissions data for each archive entry.

Release Notes:

- N/A

crates/project/src/image_store.rs

@@ -376,12 +376,6 @@ impl ImageStore {
                 entry.insert(rx.clone());
 
                 let project_path = project_path.clone();
-                // TODO kb this is causing another error, and we also pass a worktree nearby — seems ok to pass "" here?
-                // let image_path = worktree
-                //     .read(cx)
-                //     .absolutize(&project_path.path)
-                //     .map(Arc::from)
-                //     .unwrap_or_else(|_| project_path.path.clone());
                 let load_image = self
                     .state
                     .open_image(project_path.path.clone(), worktree, cx);