collab: Fix project sharing between Windows and Unix (#23680)

Closes #14258

Windows user(host) sharing a project to a guest(using macOS), and host
follows guest:


https://github.com/user-attachments/assets/ba306b6b-23f7-48b1-8ba8-fdc5992d8f00

macOS user(host) sharing a project to a guest(using Windows), and host
follows guest:



https://github.com/user-attachments/assets/c5ee5e78-870d-49e5-907d-8565977a01ae

macOS user edits files in a windows project through collab:



https://github.com/user-attachments/assets/581057cf-e7df-4e56-a0ce-ced74339906a





Release Notes:

- N/A

crates/file_finder/src/open_path_prompt.rs

@@ -93,6 +93,8 @@ impl PickerDelegate for OpenPathDelegate {
         cx.notify();
     }
 
+    // todo(windows)
+    // Is this method woring correctly on Windows? This method uses `/` for path separator.
     fn update_matches(
         &mut self,
         query: String,