wip: implement invoice generator for teamers

src/Service/Invoice/InvoiceUploadWriterInterface.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service\Invoice;
+
+use App\Entity\Disposition;
+use App\Entity\DispositionInvoice;
+use App\Entity\Upload;
+use App\Entity\User;
+
+interface InvoiceUploadWriterInterface
+{
+    public function writeFinalInvoiceUpload(
+        Disposition $disposition,
+        DispositionInvoice $invoice,
+        string $pdfBinary,
+        User $owner,
+    ): Upload;
+}