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/front/buttonWidget.tpl

@@ -0,0 +1,9 @@
+<div
+  class="inpost-izi-btn-wrapper"
+  {if [] !== $styles}
+    style="{foreach $styles as $name => $value}{$name|escape:'html'}:{$value|escape:'html'};{/foreach}"
+  {/if}
+>
+  {$widget|cleanHtml nofilter}
+  <div class="clearfix"></div>
+</div>