Add spc-debug script on Windows

bin/spc-debug.ps1

@@ -0,0 +1,12 @@
+$PHP_Exec = ".\runtime\php.exe"
+
+if (-not(Test-Path $PHP_Exec)) {
+    $PHP_Exec = Get-Command php.exe -ErrorAction SilentlyContinue | Select-Object -ExpandProperty Definition
+    if (-not $PHP_Exec) {
+        Write-Host "Error: PHP not found, you need to install PHP on your system or use 'bin/setup-runtime'." -ForegroundColor Red
+        exit 1
+    }
+}
+
+& "$PHP_Exec" -d xdebug.mode=debug -d xdebug.client_host=127.0.0.1 -d xdebug.client_port=9003 -d xdebug.start_with_request=yes ("bin/spc") @args
+exit $LASTEXITCODE