Add Allegro shipment service and related components

- Implement AllegroShipmentService for managing shipment creation and status checks.
- Create ShipmentController to handle shipment preparation and label downloading.
- Introduce ShipmentPackageRepository for database interactions related to shipment packages.
- Add methods for retrieving delivery services, creating shipments, checking creation status, and downloading labels.
- Implement address validation and token management for Allegro API integration.

resources/views/settings/apaczka.php

@@ -0,0 +1,34 @@
+<?php
+$integration = is_array($settings ?? null) ? $settings : [];
+$hasApiKey = (bool) ($integration['has_api_key'] ?? false);
+?>
+
+<section class="card">
+  <h2 class="section-title"><?= $e($t('settings.apaczka.title')) ?></h2>
+  <p class="muted mt-12"><?= $e($t('settings.apaczka.description')) ?></p>
+
+  <?php if (!empty($errorMessage)): ?>
+    <div class="alert alert--danger mt-12" role="alert"><?= $e((string) $errorMessage) ?></div>
+  <?php endif; ?>
+
+  <?php if (!empty($successMessage)): ?>
+    <div class="alert alert--success mt-12" role="status"><?= $e((string) $successMessage) ?></div>
+  <?php endif; ?>
+</section>
+
+<section class="card mt-16">
+  <h3 class="section-title"><?= $e($t('settings.apaczka.config.title')) ?></h3>
+  <form class="statuses-form mt-16" action="/settings/integrations/apaczka/save" method="post" novalidate>
+    <input type="hidden" name="_token" value="<?= $e($csrfToken ?? '') ?>">
+
+    <label class="form-field">
+      <span class="field-label"><?= $e($t('settings.apaczka.fields.api_key')) ?></span>
+      <input class="form-control" type="password" name="api_key" autocomplete="new-password">
+      <span class="muted"><?= $e($hasApiKey ? $t('settings.apaczka.api_key.saved') : $t('settings.apaczka.api_key.missing')) ?></span>
+    </label>
+
+    <div class="form-actions">
+      <button type="submit" class="btn btn--primary"><?= $e($t('settings.apaczka.actions.save')) ?></button>
+    </div>
+  </form>
+</section>