feat(塔防): 添加属性配置和等级成长系统

添加塔防生效属性配置文件 TDEnabledAttrs.ts，集中管理游戏属性
实现塔防等级成长系统 TDLevelOptions.ts，包含1-20级强化配置
调整数值平衡，除AP/HP_MAX外所有属性强度减半

assets/script/game/common/config/TDEnabledAttrs.ts

@@ -0,0 +1,33 @@
+import { Attrs } from "./HeroAttrs";
+
+export const TD_ENABLED_ATTRS: ReadonlySet<Attrs> = new Set<Attrs>([
+  Attrs.AP,
+  Attrs.AS,
+  Attrs.DIS,
+  Attrs.PIERCE,
+  Attrs.CRITICAL,
+  Attrs.CRITICAL_DMG,
+  Attrs.HP_MAX,
+  Attrs.DEF,
+  Attrs.LIFESTEAL,
+  Attrs.MANASTEAL,
+  Attrs.FREEZE_CHANCE,
+  Attrs.BURN_CHANCE,
+  Attrs.STUN_CHANCE,
+  Attrs.BACK_CHANCE,
+  Attrs.SLOW_CHANCE,
+]);
+
+export const TD_OPTIONAL_ATTRS: ReadonlySet<Attrs> = new Set<Attrs>([
+  Attrs.GOLD_GAIN,
+  Attrs.DMG_RED,
+]);
+
+export const TD_ATTR_GROUPS = {
+  towerCore: [Attrs.AP, Attrs.AS, Attrs.DIS, Attrs.PIERCE],
+  towerBonus: [Attrs.CRITICAL, Attrs.CRITICAL_DMG],
+  enemyCore: [Attrs.HP_MAX, Attrs.DEF],
+  optional: [Attrs.GOLD_GAIN, Attrs.DMG_RED],
+  control: [Attrs.FREEZE_CHANCE, Attrs.BURN_CHANCE, Attrs.STUN_CHANCE, Attrs.BACK_CHANCE, Attrs.SLOW_CHANCE],
+  sustain: [Attrs.LIFESTEAL, Attrs.MANASTEAL],
+} as const;