feat: 创建 upgrade 数据resource，编写upgrade_panel.gd动态生成升级卡片

resources/items/upgrades/data/upgrade_block_1.tres

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+[gd_resource type="Resource" script_class="ItemUpgrade" format=3 uid="uid://dfvsbd5jl31pt"]
+
+[ext_resource type="Texture2D" uid="uid://byg3400qlcem6" path="res://assets/sprites/Upgrades/8.png" id="1_worpx"]
+[ext_resource type="Script" uid="uid://ti87pqqmd7ro" path="res://resources/items/upgrades/item_upgrade.gd" id="1_ynscf"]
+
+[resource]
+script = ExtResource("1_ynscf")
+value = 1.0
+descriptin = "+ 1%"
+stat_id = "block_chance"
+item_name = "Block"
+item_icon = ExtResource("1_worpx")
+item_type = 1
+metadata/_custom_type_script = "uid://ti87pqqmd7ro"

resources/items/upgrades/data/upgrade_damage_1.tres

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+[gd_resource type="Resource" script_class="ItemUpgrade" format=3 uid="uid://htj45csm68fo"]
+
+[ext_resource type="Texture2D" uid="uid://dn68qq5evmvwa" path="res://assets/sprites/Upgrades/12.png" id="1_6nlt1"]
+[ext_resource type="Script" uid="uid://ti87pqqmd7ro" path="res://resources/items/upgrades/item_upgrade.gd" id="2_b4rq5"]
+
+[resource]
+script = ExtResource("2_b4rq5")
+value = 1.0
+descriptin = "+ 1"
+stat_id = "damage"
+item_name = "Damage"
+item_icon = ExtResource("1_6nlt1")
+item_type = 1
+metadata/_custom_type_script = "uid://ti87pqqmd7ro"

resources/items/upgrades/data/upgrade_harvesting_1.tres

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+[gd_resource type="Resource" script_class="ItemUpgrade" format=3 uid="uid://bwxjxrmg4hkfx"]
+
+[ext_resource type="Texture2D" uid="uid://k3qfoarie5u0" path="res://assets/sprites/Upgrades/7.png" id="1_wtmxu"]
+[ext_resource type="Script" uid="uid://ti87pqqmd7ro" path="res://resources/items/upgrades/item_upgrade.gd" id="2_hlrix"]
+
+[resource]
+script = ExtResource("2_hlrix")
+value = 1.0
+descriptin = "+ 1"
+stat_id = "harvesting"
+item_name = "Harvesting"
+item_icon = ExtResource("1_wtmxu")
+item_type = 1
+metadata/_custom_type_script = "uid://ti87pqqmd7ro"

resources/items/upgrades/data/upgrade_health_1.tres

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+[gd_resource type="Resource" script_class="ItemUpgrade" format=3 uid="uid://d2x2dbdfls585"]
+
+[ext_resource type="Texture2D" uid="uid://513vy8yuf2c3" path="res://assets/sprites/Upgrades/6.png" id="1_x3r4g"]
+[ext_resource type="Script" uid="uid://ti87pqqmd7ro" path="res://resources/items/upgrades/item_upgrade.gd" id="2_fqyel"]
+
+[resource]
+script = ExtResource("2_fqyel")
+value = 1.0
+descriptin = "+ 1"
+stat_id = "health"
+item_name = "Health"
+item_icon = ExtResource("1_x3r4g")
+item_type = 1
+metadata/_custom_type_script = "uid://ti87pqqmd7ro"

resources/items/upgrades/data/upgrade_hp_regen_1.tres

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+[gd_resource type="Resource" script_class="ItemUpgrade" format=3 uid="uid://3pjreo5epl8m"]
+
+[ext_resource type="Texture2D" uid="uid://ceccthrgto2um" path="res://assets/sprites/Upgrades/13.png" id="1_spl5c"]
+[ext_resource type="Script" uid="uid://ti87pqqmd7ro" path="res://resources/items/upgrades/item_upgrade.gd" id="2_8r7f1"]
+
+[resource]
+script = ExtResource("2_8r7f1")
+value = 1.0
+descriptin = "+ 1"
+stat_id = "hp_regen"
+item_name = "HP Regen"
+item_icon = ExtResource("1_spl5c")
+item_type = 1
+metadata/_custom_type_script = "uid://ti87pqqmd7ro"

resources/items/upgrades/data/upgrade_life_steal_1.tres

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+[gd_resource type="Resource" script_class="ItemUpgrade" format=3 uid="uid://cq276vsvx4uld"]
+
+[ext_resource type="Texture2D" uid="uid://dac1qxk0rktmg" path="res://assets/sprites/Upgrades/11.png" id="1_y6yk3"]
+[ext_resource type="Script" uid="uid://ti87pqqmd7ro" path="res://resources/items/upgrades/item_upgrade.gd" id="2_cmyrk"]
+
+[resource]
+script = ExtResource("2_cmyrk")
+value = 5.0
+descriptin = "+ 5"
+stat_id = "speed"
+item_name = "Speed"
+item_icon = ExtResource("1_y6yk3")
+item_type = 1
+metadata/_custom_type_script = "uid://ti87pqqmd7ro"

resources/items/upgrades/data/upgrade_luck_3.tres

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+[gd_resource type="Resource" script_class="ItemUpgrade" format=3 uid="uid://cgusn8qne4kjl"]
+
+[ext_resource type="Texture2D" uid="uid://dxl550mv1d5l6" path="res://assets/sprites/Upgrades/3.png" id="1_co2m3"]
+[ext_resource type="Script" uid="uid://ti87pqqmd7ro" path="res://resources/items/upgrades/item_upgrade.gd" id="2_qhb0c"]
+
+[resource]
+script = ExtResource("2_qhb0c")
+value = 1.0
+descriptin = "+ 1%"
+stat_id = "life_steal"
+item_name = "Life Steal"
+item_icon = ExtResource("1_co2m3")
+item_type = 1
+metadata/_custom_type_script = "uid://ti87pqqmd7ro"

resources/items/upgrades/data/upgrade_speed_5.tres

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+[gd_resource type="Resource" script_class="ItemUpgrade" format=3 uid="uid://buvdtarq3qu2j"]
+
+[ext_resource type="Texture2D" uid="uid://dxl550mv1d5l6" path="res://assets/sprites/Upgrades/3.png" id="1_2jex5"]
+[ext_resource type="Script" uid="uid://ti87pqqmd7ro" path="res://resources/items/upgrades/item_upgrade.gd" id="2_dk47u"]
+
+[resource]
+script = ExtResource("2_dk47u")
+value = 1.0
+descriptin = "+ 1%"
+stat_id = "life_steal"
+item_name = "Life Steal"
+item_icon = ExtResource("1_2jex5")
+item_type = 1
+metadata/_custom_type_script = "uid://ti87pqqmd7ro"

resources/items/upgrades/item_upgrade.gd

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+extends ItemBase
+class_name ItemUpgrade
+
+@export var value: float
+@export var descriptin: String
+@export var stat_id: String
+
+func apply_upgrade() -> void:
+	var current_value := Global.player.stats.get(stat_id) as float 
+	var new_value := float(value) + float(current_value)
+	Global.player.stats.set(stat_id, new_value)

resources/items/upgrades/item_upgrade.gd.uid

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+uid://ti87pqqmd7ro