FEATURE: add new setting to select view for category page on mobile (#30519)

app/models/mobile_category_page_style.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require "enum_site_setting"
+
+class MobileCategoryPageStyle < EnumSiteSetting
+  def self.valid_value?(val)
+    values.any? { |v| v[:value].to_s == val.to_s }
+  end
+
+  def self.values
+    @values ||= [
+      { name: "category_page_style.categories_only", value: "categories_only" },
+      {
+        name: "category_page_style.categories_with_featured_topics",
+        value: "categories_with_featured_topics",
+      },
+      { name: "category_page_style.categories_boxes", value: "categories_boxes" },
+      {
+        name: "category_page_style.categories_boxes_with_topics",
+        value: "categories_boxes_with_topics",
+      },
+      {
+        name: "category_page_style.subcategories_with_featured_topics",
+        value: "subcategories_with_featured_topics",
+      },
+    ]
+  end
+
+  def self.translate_names?
+    true
+  end
+end