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/widget.tpl

@@ -0,0 +1,5 @@
+<inpost-izi-button
+  {foreach $attributes as $name => $value}
+    {$name|escape:'html'}="{$value|escape:'html'}"
+  {/foreach}
+></inpost-izi-button>