Feat: Updating Product Service with new Methods, DTOs for ListingResult And Slider Bounds

src/Catalog/DTOs/PriceSliderBounds.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Modules\Core\Catalog\DTOs;
+
+/**
+ * A price range slider's bounds and whether it's currently narrowed —
+ * built by ProductService::priceSliderBounds(), which owns the floor/ceil
+ * rounding and "is this actually a meaningful filter" comparison, so a
+ * controller (CategoryController, SearchController, ...) doesn't have to
+ * reimplement that rule itself.
+ */
+class PriceSliderBounds
+{
+    public function __construct(
+        public readonly ?int $floor,
+        public readonly ?int $ceil,
+        public readonly bool $filtered,
+    ) {}
+}