Update CoreLibs with phpstan level 8, add qqFileUploader implementation base, add base Test class for testing

www/lib/FileUpload/Core/qqUploadedFile.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace FileUpload\Core;
+
+interface qqUploadedFile // phpcs:ignore Squiz.Classes.ValidClassName.NotCamelCaps
+{
+	/**
+	 * Save the file to the specified path
+	 *
+	 * @param string $path
+	 * @return boolean TRUE on success
+	 */
+	public function save(string $path): bool;
+
+	/**
+	 * get qqfile name from _GET array
+	 *
+	 * @return string
+	 */
+	public function getName(): string;
+
+	/**
+	 * Get file size from _SERVERa array, throws an error if not possible
+	 *
+	 * @return int
+	 *
+	 * @throws \Exception
+	 */
+	public function getSize(): int;
+}
+
+// __END__