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-spacify.md

@@ -0,0 +1,44 @@
+# spacify
+
+`spacify` is a way to insert a space between every character of a
+variable. You can optionally pass a different character or string to
+insert.
+
+## Basic usage
+```smarty
+{$myVar|spacify}
+```
+
+## Parameters
+
+| Parameter Position | Type   | Required | Default     | Description                                                     |
+|--------------------|--------|----------|-------------|-----------------------------------------------------------------|
+| 1                  | string | No       | *one space* | This what gets inserted between each character of the variable. |
+
+## Examples
+
+```php
+<?php
+
+$smarty->assign('articleTitle', 'Something Went Wrong in Jet Crash, Experts Say.');
+
+```
+
+Where template is:
+
+```smarty
+{$articleTitle}
+{$articleTitle|spacify}
+{$articleTitle|spacify:"^^"}
+```
+
+Will output:
+
+```
+Something Went Wrong in Jet Crash, Experts Say.
+S o m e t h i n g   W .... snip ....  s h ,   E x p e r t s   S a y .
+S^^o^^m^^e^^t^^h^^i^^n^^g^^ .... snip .... ^^e^^r^^t^^s^^ ^^S^^a^^y^^.
+```
+
+See also [`wordwrap`](language-modifier-wordwrap.md) and
+[`nl2br`](language-modifier-nl2br.md).