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-custom-functions/language-function-cycle.md

@@ -0,0 +1,55 @@
+# {cycle}
+
+`{cycle}` is used to alternate a set of values. This makes it easy to
+for example, alternate between two or more colors in a table, or cycle
+through an array of values.
+
+## Attributes
+
+| Attribute Name | Required | Description                                                                                                 |
+|----------------|----------|-------------------------------------------------------------------------------------------------------------|
+| name           | No       | The name of the cycle                                                                                       |
+| values         | Yes      | The values to cycle through, either a comma delimited list (see delimiter attribute), or an array of values |
+| print          | No       | Whether to print the value or not (defaults to true)                                                        |
+| advance        | No       | Whether or not to advance to the next value (defaults to true)                                              |
+| delimiter      | No       | The delimiter to use in the values attribute (defaults to ',')                                              |
+| assign         | No       | The template variable the output will be assigned to                                                        |
+| reset          | No       | The cycle will be set to the first value and not advanced (defaults to false)                               |
+
+-   You can `{cycle}` through more than one set of values in a template
+    by supplying a `name` attribute. Give each `{cycle}` a unique
+    `name`.
+
+-   You can force the current value not to print with the `print`
+    attribute set to FALSE. This would be useful for silently skipping a
+    value.
+
+-   The `advance` attribute is used to repeat a value. When set to
+    FALSE, the next call to `{cycle}` will print the same value.
+
+-   If you supply the `assign` attribute, the output of the `{cycle}`
+    function will be assigned to a template variable instead of being
+    output to the template.
+
+## Examples
+```smarty
+{section name=rows loop=$data}
+    <tr class="{cycle values="odd,even"}">
+       <td>{$data[rows]}</td>
+    </tr>
+{/section}
+```
+
+The above template would output:
+
+```html
+    <tr class="odd">
+       <td>1</td>
+    </tr>
+    <tr class="even">
+       <td>2</td>
+    </tr>
+    <tr class="odd">
+       <td>3</td>
+    </tr>
+```