Add InPost Pay integration to admin templates

- Created a new template for the cart rule form with custom label, switch, and choice widgets.
- Implemented the InPost Pay block in the order details template for displaying delivery method, APM, and VAT invoice request.
- Added legacy support for the order details template to maintain compatibility with older PrestaShop versions.

modules/inpostizi/src/Http/Util/UriResolver.php

@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace izi\prestashop\Http\Util;
+
+final class UriResolver
+{
+    public static function resolve(string $uri, string $baseUri): string
+    {
+        $uriParts = parse_url($uri);
+
+        if (!empty($uriParts['host'])) {
+            return $uri;
+        }
+
+        $baseUriParts = parse_url($baseUri);
+        $uriParts['path'] = self::resolvePath($baseUriParts, $uriParts);
+        $uriParts += $baseUriParts;
+
+        return http_build_url($uriParts);
+    }
+
+    private static function resolvePath(array $baseUri, array $uri): string
+    {
+        $basePath = $baseUri['path'] ?? null;
+        $path = $uri['path'] ?? null;
+
+        if (null === $path) {
+            $path = $basePath;
+        } elseif ('/' !== $path[0]) {
+            if (null === $basePath) {
+                $path = '/' . $path;
+            } else {
+                $segments = explode('/', $basePath);
+                array_splice($segments, -1, 1, [$path]);
+                $path = implode('/', $segments);
+            }
+        }
+
+        return empty($path) ? '/' : $path;
+    }
+}