refactor(命名): 将"饲料"统一重命名为"增益"

修改多处代码和文档中的"饲料"为"增益"，包括UI显示、类别存储、实体属性和游戏详情说明，保持术语一致性

scripts/Statemachine/EntityBase.gd

@@ -46,7 +46,7 @@ var fields = {
 	FieldStore.Entity.CRIT_DAMAGE: 1,
 	"概率": TITLE_FLAG,
 	FieldStore.Entity.LUCK_VALUE: 1,
-	"饲料": TITLE_FLAG,
+	"增益": TITLE_FLAG,
 	FieldStore.Entity.PRICE_REDUCTION: 0,
 	FieldStore.Entity.FEED_COUNT_SHOW: 3,
 	FieldStore.Entity.FEED_COUNT_CAN_MADE: 5,

scripts/Statemachine/FeedName.gd

@@ -2,7 +2,7 @@
 extends HBoxContainer
 class_name FeedName
 
-@export var displayName: String = "未命名饲料"
+@export var displayName: String = "未命名"
 @export var quality: CategoryStore.Quality = CategoryStore.Quality.COMMON
 @export var topic: CategoryStore.Topic = CategoryStore.Topic.SURVIVAL
 @export var qualityColorMap = {
@@ -40,7 +40,7 @@ class_name FeedName
 	CategoryStore.Topic.SPEED: "速度",
 	CategoryStore.Topic.DAMAGE: "伤害",
 	CategoryStore.Topic.PROBABILITY: "幸运",
-	CategoryStore.Topic.FEED: "饲料",
+	CategoryStore.Topic.FEED: "增益",
 	CategoryStore.Topic.DROP: "掉落物",
 	CategoryStore.Topic.WEAPON: "武器",
 	CategoryStore.Topic.SUMMON: "召唤",