Add alexanderweichart.de to showcase.md (#1378)

Alexander Weichart

2024-09-16 b1c60b8833840229adf18b6e6c1507cfeff2527a

 quartz/i18n/locales/definition.ts

@@ -67,6 +67,7 @@
    error: {
      title: string
      notFound: string
      home: string
    }
    folderContent: {
      folder: string