Bug: workspace.createFileSystemWatcher does not support the new VS Code 1.91 options‑based signature

Bug: workspace.createFileSystemWatcher does not support the new VS Code 1.91 options‑based signature: a task in LegoFlow-SWE (Harbor dataset). Theia’s implementation of the proposed workspace.createFileSystemWatcher API does not handle the updated method signature introduced in VS Code 1.91…

The task

Theia’s implementation of the proposed `workspace.createFileSystemWatcher` API does not handle the updated method signature introduced in VS Code 1.91. Extensions that rely on the new signature (e.g., `typescript-language-features` 1.91.1) trigger incorrect event filtering and produce repeated memory‑leak warnings.

Part of Lego-X/LegoFlow-SWE.