Add PSR HTTP Message Interfaces and Dependencies

- Implemented StreamInterface, UploadedFileInterface, and UriInterface as per PSR standards.
- Added getallheaders function to retrieve HTTP headers in a compatible manner.
- Included LICENSE files for ralouphie/getallheaders and symfony/deprecation-contracts.
- Introduced function for triggering deprecation notices in Symfony.

wp-content/plugins/autopoly-ai-translation-for-polylang-pro/vendor/composer/autoload_files.php

@@ -0,0 +1,12 @@
+<?php
+
+// autoload_files.php @generated by Composer
+
+$vendorDir = dirname(__DIR__);
+$baseDir = dirname($vendorDir);
+
+return array(
+    '7b11c4dc42b3b3023073cb14e519683c' => $vendorDir . '/ralouphie/getallheaders/src/getallheaders.php',
+    '6e3fae29631ef280660b3cdad06f25a8' => $vendorDir . '/symfony/deprecation-contracts/function.php',
+    '37a3dc5111fe8f707ab4c132ef1dbc62' => $vendorDir . '/guzzlehttp/guzzle/src/functions_include.php',
+);