Declare ext-intl and ext-zip as explicit composer requirements

DataExportService uses ZipArchive directly and the Dutch-locale
format_datetime Twig filter needs real ext-intl (the polyfill only
supports en), but composer.json only declared ext-ctype/ext-iconv.
Adding them lets `composer check-platform-reqs` catch a missing
extension before a runtime crash.

composer.json

@@ -9,6 +9,8 @@
         "php": ">=8.5",
         "ext-ctype": "*",
         "ext-iconv": "*",
+        "ext-intl": "*",
+        "ext-zip": "*",
         "doctrine/dbal": "^4.4.3",
         "doctrine/doctrine-bundle": "^3.2.2",
         "doctrine/doctrine-migrations-bundle": "^4.0",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "b2f319bad9d390a60067420d772e06e6",
+    "content-hash": "fa712d8b03b08daba40ae9f1de32e256",
     "packages": [
         {
             "name": "composer/pcre",
@@ -13511,7 +13511,9 @@
     "platform": {
         "php": ">=8.5",
         "ext-ctype": "*",
-        "ext-iconv": "*"
+        "ext-iconv": "*",
+        "ext-intl": "*",
+        "ext-zip": "*"
     },
     "platform-dev": {},
     "plugin-api-version": "2.9.0"