fix: render product detail pages on TYPO3 13

- ObjectManager replaced by GeneralUtility::makeInstance(), the
  services fetched that way are public
- QueryBuilder::add('orderBy') and the remaining execute() calls,
  detailAction returns a response
- PHP 8 warnings for missing array keys (same values as on PHP 7.4)
- Webcam images are external URLs: plain img tag, f:image only takes
  FAL files
- typo3_encore 7 needs the PKG:ssch/typo3-encore: prefix and
  external = 1 so TYPO3's path check does not drop the entry
- CDN image rewriting as a middleware instead of EXT:replacer, which
  is not PHP 8.5 clean; same pattern, only for page responses
- vhs 8 for the ViewHelpers the templates use
- OpenGraph meta tag manager skips the backend
- myEpUrl with trailing slash as in production

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/ep_theme/Configuration/TypoScript/Page/Main.typoscript

@@ -73,12 +73,16 @@ page {
     # RequestHandler turns this into `compress => false`, which PageRendererHooks forwards to
     # typo3_encore's TagRenderer (whose own default it would otherwise override).
     includeCSS {
-        main = typo3_encore:EpThemeConfig:main
+        main = PKG:ssch/typo3-encore:EpThemeConfig:main
+        # Skips TYPO3's file path check, which would drop the entry name before typo3_encore's hook sees it
+        main.external = 1
         main.disableCompression = 1
     }
 
     includeJSFooter {
-        main = typo3_encore:EpThemeConfig:main
+        main = PKG:ssch/typo3-encore:EpThemeConfig:main
+        # Skips TYPO3's file path check, which would drop the entry name before typo3_encore's hook sees it
+        main.external = 1
         main.defer = 1
         main.disableCompression = 1
     }