feat: Move event runtime implementation into core

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

core/lib/Event/DeferredProcessingResult.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KTXC\Event;
+
+final readonly class DeferredProcessingResult
+{
+    public function __construct(
+        public int $processed,
+        public int $remaining,
+        public bool $deadlineExceeded,
+        public bool $limitExceeded = false,
+    ) {
+    }
+}