chore: Projektbasis und PostgreSQL-Migrationen einrichten

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

next-env.d.ts

@@ -0,0 +1,7 @@
+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+import "./.next/types/routes.d.ts";
+import "./.next/types/root-params.d.ts";
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/app/api-reference/config/typescript for more information.