fix: Windows embed SAPI, archive extraction, and libxml2 compat

- Fix php-cs-fixer style issues (single-quote escapes, pre-increment)
- Add secur32.lib to LDFLAGS for php8ts.dll (curl SSPI support)
- Strip removed libxml2 symbols from .def by scanning headers
- Respect #ifdef LIBXML_*_ENABLED guards for disabled features
- Two-step archive extraction using Windows native tar

Author: luthermonson

src/SPC/builder/windows/WindowsBuilder.php

@@ -223,7 +223,7 @@ public function buildEmbed(): void
         foreach (['main', 'Zend', 'TSRM', 'sapi', 'ext'] as $dir) {
             $src_dir = "{$php_src}\\{$dir}";
             if (is_dir($src_dir)) {
-                cmd()->exec("xcopy /E /I /Y " . escapeshellarg($src_dir . '\\*.h') . ' ' . escapeshellarg($include_dst . '\\' . $dir . '\\'));
+                cmd()->exec('xcopy /E /I /Y ' . escapeshellarg($src_dir . '\*.h') . ' ' . escapeshellarg($include_dst . '\\' . $dir . '\\'));
             }
         }
         // Copy generated config header

src/SPC/store/FileSystem.php

@@ -646,7 +646,7 @@ private static function extractArchive(string $filename, string $target): void
                     if (!file_exists($tarFile)) {
                         $tarFile .= '.tar';
                     }
-                    $winTar = getenv('SystemRoot') . '\\System32\\tar.exe';
+                    $winTar = getenv('SystemRoot') . '\System32\tar.exe';
                     f_passthru("\"{$winTar}\" -xf \"{$tarFile}\" -C \"{$target}\" --strip-components 1");
                     @unlink($tarFile);
                 })(),

src/SPC/store/SourcePatcher.php

@@ -675,12 +675,12 @@ public static function patchLibxml2DefForWindows(): void
                 $trimmed = ltrim($hline);
                 // Track #ifdef/#ifndef LIBXML_*_ENABLED blocks
                 if (preg_match('/^#\s*if(?:def|ndef)?\s+.*?(LIBXML_\w+_ENABLED)/', $trimmed, $im)) {
-                    $ifdef_depth++;
+                    ++$ifdef_depth;
                     if (isset($disabled_features[$im[1]])) {
                         $disabled_depth = $ifdef_depth;
                     }
                 } elseif (preg_match('/^#\s*if\b/', $trimmed)) {
-                    $ifdef_depth++;
+                    ++$ifdef_depth;
                 } elseif (preg_match('/^#\s*endif/', $trimmed)) {
                     if ($ifdef_depth === $disabled_depth) {
                         $disabled_depth = 0;
@@ -721,7 +721,7 @@ public static function patchLibxml2DefForWindows(): void
             if ($sym === '' || $sym === 'EXPORTS' || str_starts_with($sym, ';') || isset($header_symbols[$sym])) {
                 $filtered[] = $line;
             } else {
-                $removed++;
+                ++$removed;
             }
         }