improve stop script with better error handling

script/stop.bat

@@ -3,7 +3,6 @@ chcp 65001 >nul
 setlocal
 cd /d %~dp0
 
-REM Stop processes using PowerShell
-powershell -ExecutionPolicy Bypass -Command "& { Write-Host 'Stopping processes on 8923 and 6173...' -ForegroundColor Cyan; $ports = @(8923, 6173); foreach ($port in $ports) { $p = Get-NetTCPConnection -LocalPort $port -ErrorAction SilentlyContinue; if ($p) { Stop-Process -Id $p.OwningProcess -Force; Write-Host \"Stopped port $port\" } }; Write-Host 'Done.' -ForegroundColor Green }"
+powershell -ExecutionPolicy Bypass -File stop.ps1
 
-timeout /t 2
+pause