* Add windows-shell-reliability skill * Fix validation errors in windows-shell-reliability skill * fix(windows-shell-reliability): Correct shell guidance Scope the UTF-8 workaround to older Windows PowerShell behavior,\ninclude stderr in the logging recipe, and replace the foreground\nredirection example with a true detached Start-Process pattern. --------- Co-authored-by: sickn33 <sickn33@users.noreply.github.com>