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-modifiers/language-modifier-indent.md

@@ -0,0 +1,67 @@
+# indent
+
+This indents a string on each line, default is 4. As an optional
+parameter, you can specify the number of characters to indent. As an
+optional second parameter, you can specify the character to use to
+indent with. For example: use `"\t"` for a tab.
+
+## Basic usage
+```smarty
+{$myVar|indent:4}
+```
+
+## Parameters
+
+| Parameter Position | Type    | Required | Default     | Description                                       |
+|--------------------|---------|----------|-------------|---------------------------------------------------|
+| 1                  | integer | No       | 4           | This determines how many characters to indent to. |
+| 2                  | string  | No       | (one space) | This is the character used to indent with.        |
+
+## Examples
+
+```php
+<?php
+
+$smarty->assign('articleTitle',
+                'NJ judge to rule on nude beach.
+Sun or rain expected today, dark tonight.
+Statistics show that teen pregnancy drops off significantly after 25.'
+                );
+```
+
+Where template is:
+
+```smarty
+{$articleTitle}
+
+{$articleTitle|indent}
+
+{$articleTitle|indent:10}
+
+{$articleTitle|indent:1:"\t"}
+```
+       
+Will output:
+
+```
+NJ judge to rule on nude beach.
+Sun or rain expected today, dark tonight.
+Statistics show that teen pregnancy drops off significantly after 25.
+
+    NJ judge to rule on nude beach.
+    Sun or rain expected today, dark tonight.
+    Statistics show that teen pregnancy drops off significantly after 25.
+
+          NJ judge to rule on nude beach.
+          Sun or rain expected today, dark tonight.
+          Statistics show that teen pregnancy drops off significantly after 25.
+
+        NJ judge to rule on nude beach.
+        Sun or rain expected today, dark tonight.
+        Statistics show that teen pregnancy drops off significantly after 25.
+```
+       
+
+See also [`strip`](language-modifier-strip.md),
+[`wordwrap`](language-modifier-wordwrap.md) and
+[`spacify`](language-modifier-spacify.md).