refactor(武器系统): 重构武器冷却和攻击逻辑

- 将CooldownTimer的startCooldown方法重命名为更简洁的start
- 为EntityBase添加weaponStore节点管理武器
- 修改武器攻击逻辑，现在由Weapon类自身处理冷却和攻击
- 调整武器卡片的UI布局和描述居中显示
- 为Rooster角色添加预设武器

components/Abstracts/EntityBase.tscn

@@ -258,6 +258,9 @@ alpha_curve = SubResource("CurveTexture_vvfxd")
 [node name="EntityBase" type="CharacterBody2D"]
 script = ExtResource("1_mvol6")
 
+[node name="weaponStore" type="Node2D" parent="."]
+unique_name_in_owner = true
+
 [node name="sounds" type="Node2D" parent="."]
 unique_name_in_owner = true
 

components/Abstracts/WeaponCardBase.tscn

@@ -23,7 +23,7 @@ corner_radius_bottom_right = 5
 corner_radius_bottom_left = 5
 
 [node name="WeaponCard" type="PanelContainer"]
-offset_right = 300.0
+offset_right = 350.0
 offset_bottom = 304.0
 theme_override_styles/panel = SubResource("StyleBoxFlat_n2ewr")
 script = ExtResource("1_g802t")
@@ -32,6 +32,7 @@ metadata/_edit_lock_ = true
 [node name="container" type="VBoxContainer" parent="."]
 layout_mode = 2
 theme_override_constants/separation = 10
+alignment = 1
 
 [node name="selectBtn" type="Button" parent="container"]
 unique_name_in_owner = true
@@ -80,7 +81,6 @@ quality = 1
 [node name="description" type="RichTextLabel" parent="container"]
 unique_name_in_owner = true
 layout_mode = 2
-size_flags_vertical = 0
 bbcode_enabled = true
 text = "造成[color=cyan]10.0[/color]点伤害。"
 fit_content = true