WSL: aws sso login fails to open browser with gio

[josephaw1022]

Summary

When running aws sso login in WSL, automatic browser launch can fail with an Operation not supported error from Linux desktop launchers.

Reproduction

1. Run AWS CLI in WSL
2. Run aws sso login --profile <profile>
3. Observe browser launch failure and manual URL fallback

Expected

AWS CLI should open the authorization URL using WSL-compatible browser interop.

Notes

A fix has been implemented to detect WSL and use WSL browser launch behavior (prefer wslview, fallback to Windows shell launch).