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/views/templates/hook/legacy/admin/order_details.tpl

@@ -0,0 +1,15 @@
+<div id="inpostizi_block_backend" class="panel">
+  <div class="panel-heading">InPost Pay</div>
+
+  <dl class="well list-detail">
+    <dt>{l s='Delivery method' mod='inpostizi'}:</dt><dd>{$delivery}</dd>
+
+    {if $apm !== ''}
+      <dt>{l s='APM' mod='inpostizi'}:</dt><dd>{$apm}</dd>
+    {/if}
+
+    {if $issue_invoice}
+      <dt>{l s='The customer requested a VAT invoice' mod='inpostizi'}</dt><dd></dd>
+    {/if}
+  </dl>
+</div>