feat: 添加敌人并且追踪player，同时避免敌人重叠

resources/units/enemies/stats_enemy_charger.tres

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+[gd_resource type="Resource" script_class="UnitStats" format=3 uid="uid://delxlqjos3br"]
+
+[ext_resource type="Texture2D" uid="uid://emsi6ifyt0vf" path="res://assets/sprites/Enemies/Enemy_5.png" id="1_ab1gs"]
+[ext_resource type="Script" uid="uid://dgjdpmaiufhs6" path="res://resources/units/unit_stats.gd" id="2_mh3yp"]
+
+[resource]
+script = ExtResource("2_mh3yp")
+name = "Charger"
+type = 1
+icon = ExtResource("1_ab1gs")
+health = 8
+health_increase_per_wave = 3.0
+damage = 2.5
+damage_increase_per_wave = 2.0
+speed = 280
+luck = 0.0
+block_chance = 6.0
+gold_drop = 3
+metadata/_custom_type_script = "uid://dgjdpmaiufhs6"

resources/units/enemies/stats_enemy_chaser_fast.tres

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+[gd_resource type="Resource" script_class="UnitStats" format=3 uid="uid://cv3187t7wsfxh"]
+
+[ext_resource type="Texture2D" uid="uid://c6vplmpl4q4jr" path="res://assets/sprites/Enemies/Enemy_3.png" id="1_ymlpp"]
+[ext_resource type="Script" uid="uid://dgjdpmaiufhs6" path="res://resources/units/unit_stats.gd" id="2_86dbv"]
+
+[resource]
+script = ExtResource("2_86dbv")
+name = "Chaser Fast"
+type = 1
+icon = ExtResource("1_ymlpp")
+health = 6
+health_increase_per_wave = 2.5
+damage = 1.5
+damage_increase_per_wave = 1.5
+speed = 350
+luck = 0.0
+block_chance = 5.0
+gold_drop = 2
+metadata/_custom_type_script = "uid://dgjdpmaiufhs6"

resources/units/enemies/stats_enemy_chaser_mid.tres

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+[gd_resource type="Resource" script_class="UnitStats" format=3 uid="uid://db0igkyfvumk7"]
+
+[ext_resource type="Texture2D" uid="uid://bf4ls8ho3cuqa" path="res://assets/sprites/Enemies/Enemy_2.png" id="1_gkg84"]
+[ext_resource type="Script" uid="uid://dgjdpmaiufhs6" path="res://resources/units/unit_stats.gd" id="2_o5vp8"]
+
+[resource]
+script = ExtResource("2_o5vp8")
+name = "Chaser Mid"
+type = 1
+icon = ExtResource("1_gkg84")
+health = 8
+health_increase_per_wave = 2.0
+damage = 2.0
+luck = 0.0
+block_chance = 7.0
+gold_drop = 2
+metadata/_custom_type_script = "uid://dgjdpmaiufhs6"

resources/units/enemies/stats_enemy_chaser_slow.tres

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+[gd_resource type="Resource" script_class="UnitStats" format=3 uid="uid://bn4dskgwnahaq"]
+
+[ext_resource type="Texture2D" uid="uid://d1ou504pylric" path="res://assets/sprites/Enemies/Enemy_1.png" id="1_cneyk"]
+[ext_resource type="Script" uid="uid://dgjdpmaiufhs6" path="res://resources/units/unit_stats.gd" id="1_m42qi"]
+
+[resource]
+script = ExtResource("1_m42qi")
+name = "Chaser Slow"
+type = 1
+icon = ExtResource("1_cneyk")
+health = 6
+damage = 1.5
+speed = 250
+luck = 0.0
+block_chance = 3.0
+metadata/_custom_type_script = "uid://dgjdpmaiufhs6"

resources/units/enemies/stats_enemy_shooter.tres

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+[gd_resource type="Resource" script_class="UnitStats" format=3 uid="uid://bnknrm368mpwb"]
+
+[ext_resource type="Texture2D" uid="uid://4mllmwdfhmce" path="res://assets/sprites/Enemies/Enemy_4.png" id="1_llpja"]
+[ext_resource type="Script" uid="uid://dgjdpmaiufhs6" path="res://resources/units/unit_stats.gd" id="2_1vxf5"]
+
+[resource]
+script = ExtResource("2_1vxf5")
+name = "Shooter"
+type = 1
+icon = ExtResource("1_llpja")
+health = 4
+health_increase_per_wave = 2.0
+damage = 3.0
+damage_increase_per_wave = 1.5
+speed = 260
+luck = 0.0
+block_chance = 3.0
+gold_drop = 3
+metadata/_custom_type_script = "uid://dgjdpmaiufhs6"

resources/units/players/stats_player_brawler.tres

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+[gd_resource type="Resource" script_class="UnitStats" format=3 uid="uid://dhbwq0p1appau"]
+
+[ext_resource type="Texture2D" uid="uid://dpxw8tsbgrfse" path="res://assets/sprites/Players/Player_2.png" id="1_artcn"]
+[ext_resource type="Script" uid="uid://dgjdpmaiufhs6" path="res://resources/units/unit_stats.gd" id="1_fokdh"]
+
+[resource]
+script = ExtResource("1_fokdh")
+name = "Brawler"
+icon = ExtResource("1_artcn")
+health = 25
+health_increase_per_wave = 0.0
+damage = 4
+damage_increase_per_wave = 0.0
+speed = 270
+luck = 3.0
+block_chance = 5.0
+gold_drop = 0
+metadata/_custom_type_script = "uid://dgjdpmaiufhs6"

resources/units/players/stats_player_bunny.tres

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+[gd_resource type="Resource" script_class="UnitStats" format=3 uid="uid://ceyne237du1"]
+
+[ext_resource type="Script" uid="uid://dgjdpmaiufhs6" path="res://resources/units/unit_stats.gd" id="1_02km3"]
+[ext_resource type="Texture2D" uid="uid://dmox6e28kf6ax" path="res://assets/sprites/Players/Player_4.png" id="1_ul0bi"]
+
+[resource]
+script = ExtResource("1_02km3")
+name = "Bunny"
+icon = ExtResource("1_ul0bi")
+health = 20
+health_increase_per_wave = 0.0
+damage = 5
+damage_increase_per_wave = 0.0
+speed = 325
+luck = 5.0
+block_chance = 3.0
+gold_drop = 0
+metadata/_custom_type_script = "uid://dgjdpmaiufhs6"

resources/units/players/stats_player_crazy.tres

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+[gd_resource type="Resource" script_class="UnitStats" format=3 uid="uid://cuj1u77pg06ah"]
+
+[ext_resource type="Texture2D" uid="uid://dq63ocnu3lset" path="res://assets/sprites/Players/Player_3}.png" id="1_6fhtk"]
+[ext_resource type="Script" uid="uid://dgjdpmaiufhs6" path="res://resources/units/unit_stats.gd" id="2_olwl6"]
+
+[resource]
+script = ExtResource("2_olwl6")
+name = "Crazy"
+icon = ExtResource("1_6fhtk")
+health = 15
+health_increase_per_wave = 0.0
+damage = 3
+damage_increase_per_wave = 0.0
+speed = 350
+luck = 5.0
+block_chance = 5.0
+gold_drop = 0
+metadata/_custom_type_script = "uid://dgjdpmaiufhs6"

resources/units/players/stats_player_knight.tres

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+[gd_resource type="Resource" script_class="UnitStats" format=3 uid="uid://crhkwist448wy"]
+
+[ext_resource type="Texture2D" uid="uid://bt0lww88864ws" path="res://assets/sprites/Players/Player_5.png" id="1_ujefh"]
+[ext_resource type="Script" uid="uid://dgjdpmaiufhs6" path="res://resources/units/unit_stats.gd" id="2_xvmk0"]
+
+[resource]
+script = ExtResource("2_xvmk0")
+name = "Knight"
+icon = ExtResource("1_ujefh")
+health = 30
+health_increase_per_wave = 0.0
+damage = 6
+damage_increase_per_wave = 0.0
+speed = 260
+block_chance = 10.0
+gold_drop = 0
+metadata/_custom_type_script = "uid://dgjdpmaiufhs6"

resources/units/players/stats_player_well_rounded.tres

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+[gd_resource type="Resource" script_class="UnitStats" format=3 uid="uid://btnfef0ui2ju8"]
+
+[ext_resource type="Texture2D" uid="uid://cproxhccob85g" path="res://assets/sprites/Players/Player_1.png" id="1_6skj5"]
+[ext_resource type="Script" uid="uid://dgjdpmaiufhs6" path="res://resources/units/unit_stats.gd" id="1_g5q6j"]
+
+[resource]
+script = ExtResource("1_g5q6j")
+name = "Well Rounded"
+icon = ExtResource("1_6skj5")
+health = 15
+health_increase_per_wave = 0.0
+damage = 3
+damage_increase_per_wave = 0.0
+luck = 5.0
+block_chance = 1.0
+gold_drop = 0
+metadata/_custom_type_script = "uid://dgjdpmaiufhs6"

resources/units/unit_stats.gd

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+extends Resource
+class_name UnitStats
+
+enum UnitType {
+	PLAYER,
+	ENEMY
+}
+
+@export var name: String
+@export var type: UnitType
+@export var icon: Texture2D
+@export var health := 1
+@export var health_increase_per_wave := 1.0
+@export var damage := 1.0
+@export var damage_increase_per_wave := 1.0
+@export var speed := 300
+@export var luck := 1.0
+@export var block_chance := 0.0
+@export var gold_drop := 1

resources/units/unit_stats.gd.uid

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+uid://dgjdpmaiufhs6