Amazon Q VS Code Extension Fails to Open Files on Windows — %5C Encoded Path Issue

After updating to the latest version of the Amazon Q VS Code extension, the "Review Changes" action fails to open files in the editor on Windows.

## Steps to reproduce the issue

Install the latest Amazon Q extension on Windows.

Open a project (with typical Windows paths, e.g. C:\Users\Username\Project).

Trigger Review Changes.

VS Code shows error and file cannot be opened.

## Expected behavior

The extension should decode %5C backslashes or use forward slashes (/) so that file paths resolve correctly on Windows.

## System details (run `AWS: About` and/or `Amazon Q: About`)

- OS:
- Visual Studio Code version:
- AWS Toolkit version:
- Amazon Q version:

Start by reproducing the Review Changes action on Windows using the paths described in the issue, then trace where the Amazon Q VS Code extension handles the encoded path. Confirm the behavior with the supplied VS Code and Amazon Q system details, and consider the work done when Review Changes opens the intended files without %5C path errors.

Written by the indexing model from the issue text.