feat: 1. 添加武器基础脚本

2. 添加武器基本resources
3. 武器碰撞 RangeArea 进入和退出检测
4. 添加 Hitbox 进行武器碰撞敌人区域（只是添加了，功能还没实现）
5. 武器冷却时间 weapon_base / CooldownTimer

resources/items/weapons/melee/punch/item_punch_4.tres

@@ -0,0 +1,16 @@
+[gd_resource type="Resource" script_class="ItemWeapon" format=3 uid="uid://b535w50o17ui"]
+
+[ext_resource type="Texture2D" uid="uid://cyh23wqn8vcac" path="res://assets/sprites/Weapons/Icons/weapon_punch_icon.png" id="1_f1uf4"]
+[ext_resource type="Script" uid="uid://26bxxaoso6np" path="res://resources/items/weapons/item_weapon.gd" id="2_503wk"]
+[ext_resource type="PackedScene" uid="uid://d1igydtpm3sq8" path="res://scenes/weapons/melee/weapon_punch.tscn" id="2_tm866"]
+[ext_resource type="Resource" uid="uid://d32uq8u04r5t7" path="res://resources/items/weapons/melee/punch/stats_punch_4.tres" id="3_f1uf4"]
+
+[resource]
+script = ExtResource("2_503wk")
+scene = ExtResource("2_tm866")
+stats = ExtResource("3_f1uf4")
+item_name = "Punch IV"
+item_icon = ExtResource("1_f1uf4")
+item_tier = 3
+item_cost = 130
+metadata/_custom_type_script = "uid://26bxxaoso6np"