Dev-Umgebung: Kompatibilität für PHP 8.3 + Smarty 4.5.6

- Smarty 4.1.1 → 4.5.6 (behebt dynamic property deprecations)
- Core-Klassen: #[\AllowDynamicProperties] für Admin_role, base, Config,
  Customer, Customer_group, CustomerGroups, Item, Structure, website
- website.class.php: counts[parent_id] initialisieren vor ++ (PHP 8.1)
- layout.class.php: HTTP_ACCEPT_LANGUAGE mit isset-Guard
- website_init.php: session_status()-Check vor session_start
- .htaccess: HTTPS-Redirect via X-Forwarded-Proto (statt SERVER_PORT)
- themes/easyshop_advanced/media/: Parent-Theme-Assets nachgezogen
- .gitignore: smarty.4.1.1.bak ausschließen

libs/smarty/docs/designers/language-builtin-functions/language-function-for.md

@@ -0,0 +1,91 @@
+# {for}
+
+The `{for}{forelse}` tag is used to create simple loops. The following different formats are supported:
+
+-   `{for $var=$start to $end}` simple loop with step size of 1.
+
+-   `{for $var=$start to $end step $step}` loop with individual step
+    size.
+
+`{forelse}` is executed when the loop is not iterated.
+
+## Attributes
+
+| Attribute | Required | Description                    |
+|-----------|----------|--------------------------------|
+| max       | No       | Limit the number of iterations |
+
+## Option Flags
+
+| Name    | Description                          |
+|---------|--------------------------------------|
+| nocache | Disables caching of the `{for}` loop |
+
+## Examples
+
+```smarty
+<ul>
+    {for $foo=1 to 3}
+        <li>{$foo}</li>
+    {/for}
+</ul>
+```
+      
+The above example will output:
+
+```html
+<ul>
+    <li>1</li>
+    <li>2</li>
+    <li>3</li>
+</ul>
+```
+      
+```php
+<?php
+$smarty->assign('to',10);
+```
+    
+```smarty
+<ul>
+    {for $foo=3 to $to max=3}
+        <li>{$foo}</li>
+    {/for}
+</ul>
+```
+
+The above example will output:
+
+```html
+<ul>
+    <li>3</li>
+    <li>4</li>
+    <li>5</li>
+</ul>
+```
+
+```php
+<?php
+$smarty->assign('start',10);
+$smarty->assign('to',5);
+```
+
+```smarty
+<ul>
+    {for $foo=$start to $to}
+        <li>{$foo}</li>
+    {forelse}
+      no iteration
+    {/for}
+</ul>
+```
+
+The above example will output:
+
+```
+   no iteration
+```
+      
+See also [`{foreach}`](./language-function-foreach.md),
+[`{section}`](./language-function-section.md) and
+[`{while}`](./language-function-while.md)