Sorting: Added sort set form manager UI JS

Extracted much code to be shared with the shelf books management UI

app/Sorting/SortSetOperation.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace BookStack\Sorting;
+
+enum SortSetOperation: string
+{
+    case NameAsc = 'name_asc';
+    case NameDesc = 'name_desc';
+    case NameNumericAsc = 'name_numeric_asc';
+    case CreatedDateAsc = 'created_date_asc';
+    case CreatedDateDesc = 'created_date_desc';
+    case UpdateDateAsc = 'updated_date_asc';
+    case UpdateDateDesc = 'updated_date_desc';
+    case ChaptersFirst = 'chapters_first';
+    case ChaptersLast = 'chapters_last';
+
+    /**
+     * Provide a translated label string for this option.
+     */
+    public function getLabel(): string
+    {
+        $key = $this->value;
+        $label = '';
+        if (str_ends_with($key, '_asc')) {
+            $key = substr($key, 0, -4);
+            $label = trans('settings.sort_set_op_asc');
+        } elseif (str_ends_with($key, '_desc')) {
+            $key = substr($key, 0, -5);
+            $label = trans('settings.sort_set_op_desc');
+        }
+
+        $label = trans('settings.sort_set_op_' . $key) . ' ' . $label;
+        return trim($label);
+    }
+
+    /**
+     * @return SortSetOperation[]
+     */
+    public static function allExcluding(array $operations): array
+    {
+        $all = SortSetOperation::cases();
+        return array_diff($all, $operations);
+    }
+}