feat: 添加音元护盾武器和召唤物功能

实现音元护盾武器系统，包含以下内容：
- 新增护盾武器资源及脚本
- 添加护盾召唤物逻辑
- 实现护盾AI跟随主人功能
- 更新公鸡角色默认武器为护盾

scripts/Contents/AIPresets/Summon.gd

@@ -0,0 +1,7 @@
+class_name PresetSummonAI
+
+static func lockMaster(summon: SummonBase, myMaster: EntityBase, onTexture: bool = false) -> void:
+	if onTexture:
+		summon.position = myMaster.texture.global_position
+	else:
+		summon.position = myMaster.position

scripts/Contents/AIPresets/Summon.gd.uid

@@ -0,0 +1 @@
+uid://ds0dbvm0r34nv

scripts/Contents/Summons/Shield.gd

@@ -0,0 +1,7 @@
+extends SummonBase
+class_name ShieldSummon
+
+func register():
+	fields[FieldStore.Entity.PENARATION_RESISTANCE] = 1.0
+func ai():
+	PresetSummonAI.lockMaster(self, myMaster, true)

scripts/Contents/Summons/Shield.gd.uid

@@ -0,0 +1 @@
+uid://fc3pppnguup

scripts/Contents/Weapons/Shield.gd

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+@tool
+extends Weapon
+class_name ShieldWeapon
+
+func update(to: int, origin: Dictionary, _entity: EntityBase):
+	origin["atk"] += 2 * to * soulLevel
+	return origin
+func attack(entity: EntityBase):
+	var summon = entity.summon(ComponentManager.getSummon("Shield"))
+	if !summon: return true
+	summon.fields[FieldStore.Entity.MAX_HEALTH] = readStore("atk")
+	summon.health = summon.fields[FieldStore.Entity.MAX_HEALTH]
+	return true

scripts/Contents/Weapons/Shield.gd.uid

@@ -0,0 +1 @@
+uid://dcacy48pcfci3