[PHP 8.3 support](#133) : add [json_validate function](https://php.watch/versions/8.3/json_validate)

Author: llaville

data/reference/extension/standard/83/functions.json

@@ -0,0 +1,7 @@
+[
+    {
+        "name": "json_validate",
+        "ext_min": "8.3.0alpha1",
+        "php_min": "8.3.0alpha1"
+    }
+]

src/Application/Command/Init/InitHandler.php

@@ -1229,7 +1229,7 @@ private function majorReleaseDefinitionProvider(): Generator
                 '40', '41', '42', '43',
                 '50', '51', '52', '53', '54', '55',
                 '70', '71', '72', '73', '74',
-                '80', '81', '82',
+                '80', '81', '82', '83',
             ],
             'iniEntries' => [
                 '40',