[Refactor] Replace hardcoded categories with data-driven SO system and abstract dice

- Add abstract dice system (IDie interface, DieDefinitionSO, StandardDieSO, DieInstance)
  to support future custom dice types while keeping backward compat via int[] DiceValues
- Replace YachtCategory enum and CategoryScorer switch with CategoryDefinitionSO hierarchy:
  SumOfValueCategorySO, NOfAKindCategorySO, FullHouseCategorySO, StraightCategorySO, SumAllCategorySO
- Add CategoryCatalogSO for ordered category collections and DiceCheckUtility for shared logic
- Refactor ScoringSystem, Views, GameManager, GameController to use SO references
- Update CategoryCondition modifier to use SO reference instead of enum
- Update all editor tests to use SO-based categories and DieInstance

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Assets/Scripts/Modifiers/Conditions/CategoryCondition.cs

@@ -1,15 +1,15 @@
 using UnityEngine;
+using YachtDice.Categories;
 using YachtDice.Modifiers.Core;
 using YachtDice.Modifiers.Definition;
 using YachtDice.Modifiers.Runtime;
-using YachtDice.Scoring;
 
 namespace YachtDice.Modifiers.Conditions
 {
     [CreateAssetMenu(fileName = "CategoryCondition", menuName = "YachtDice/Modifiers/Conditions/Category")]
     public class CategoryCondition : ConditionSO
     {
-        [SerializeField] private YachtCategory requiredCategory;
+        [SerializeField] private CategoryDefinitionSO requiredCategory;
 
         public override bool Evaluate(ModifierContext context, ModifierInstance instance)
         {
@@ -17,7 +17,7 @@ namespace YachtDice.Modifiers.Conditions
         }
 
 #if UNITY_EDITOR
-        public static CategoryCondition CreateForTest(YachtCategory category)
+        public static CategoryCondition CreateForTest(CategoryDefinitionSO category)
         {
             var so = CreateInstance<CategoryCondition>();
             so.requiredCategory = category;