[Refactor] Replace [SerializeField] + getter with [field: SerializeField] auto-properties

Convert serialized private fields with public arrow getters to
[field: SerializeField] auto-properties across ScriptableObjects
(DieDefinitionSO, CategoryDefinition, ModifierDefinition, Effect,
ModifierBehavior, SumOfValueCategory) and select MonoBehaviours
(DiceRoller, Dice.Entry struct). Fields with type-changing getters
(List→IReadOnlyList) or computed getters are intentionally kept as-is.

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

Assets/Scripts/Dice/DiceRoller.cs

@@ -14,10 +14,9 @@ namespace YachtDice.Dice
         [Header("References")]
         [SerializeField] private Dice dice;
         [SerializeField] private Rigidbody rb;
-        [SerializeField] private DieDefinitionSO definition;
 
         /// <summary>Определение типа дайса (назначается в инспекторе).</summary>
-        public DieDefinitionSO Definition => definition;
+        [field: SerializeField] public DieDefinitionSO Definition { get; private set; }
 
         [Header("Throw Settings")]
         [Tooltip("Сила подброса вверх")]