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-ldelim.md

@@ -0,0 +1,51 @@
+# {ldelim}, {rdelim}
+
+`{ldelim}` and `{rdelim}` are used for [escaping](../language-basic-syntax/language-escaping.md)
+template delimiters, by default **{** and **}**. You can also use
+[`{literal}{/literal}`](./language-function-literal.md) to escape blocks of
+text eg Javascript or CSS. See also the complementary
+[`{$smarty.ldelim}`](../../programmers/api-variables/variable-left-delimiter.md).
+
+```smarty
+{* this will print literal delimiters out of the template *}
+
+{ldelim}funcname{rdelim} is how functions look in Smarty!
+```
+
+The above example will output:
+
+```
+{funcname} is how functions look in Smarty!
+```
+
+Another example with some Javascript
+
+```smarty
+<script>
+function foo() {ldelim}
+    ... code ...
+{rdelim}
+</script>
+```
+
+will output
+
+```html
+<script>
+function foo() {
+    .... code ...
+}
+</script>
+```
+
+```smarty
+<script>
+    function myJsFunction(){ldelim}
+        alert("The server name\n{$smarty.server.SERVER_NAME|escape:javascript}\n{$smarty.server.SERVER_ADDR|escape:javascript}");
+    {rdelim}
+</script>
+<a href="javascript:myJsFunction()">Click here for Server Info</a>
+```
+
+See also [`{literal}`](./language-function-literal.md) and [escaping Smarty
+parsing](../language-basic-syntax/language-escaping.md).