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/admin/order_details.tpl

@@ -0,0 +1,31 @@
+<div id="inpostizi_block_backend" class="card">
+  <div class="card-header">
+    <h3 class="card-header-title">
+      InPost Pay
+    </h3>
+  </div>
+
+  <div class="card-body">
+    <div class="row mt-3">
+      <div class="col">
+        <p class="mb-1">
+          <strong>{l s='Delivery method' mod='inpostizi'}:</strong>
+        </p>
+        <p>{$delivery}</p>
+
+        {if $apm != ''}
+          <p class="mb-1">
+            <strong>{l s='APM' mod='inpostizi'}:</strong>
+          </p>
+          <p>{$apm}</p>
+        {/if}
+
+        {if $issue_invoice}
+          <p>
+            <strong>{l s='The customer requested a VAT invoice' mod='inpostizi'}</strong>
+          </p>
+        {/if}
+      </div>
+    </div>
+  </div>
+</div>