feat(Feeds): 新增武器卡片并修复旧卡片问题

添加A-ChainGun、A-NuclearBomb、A-Meowmere和A-MushroomPickaxe四个新武器卡片
删除旧的ChainGun、NuclearBomb、Meowmere和MushroomPickaxe卡片文件
修正卡片中的显示名称和资源引用问题

components/Feeds/A-ChainGun.tscn

@@ -0,0 +1,22 @@
+[gd_scene load_steps=4 format=3 uid="uid://bgq3u1646y1lb"]
+
+[ext_resource type="PackedScene" uid="uid://bykwevnv7keeh" path="res://components/Abstracts/FeedCardBase.tscn" id="1_7uifb"]
+[ext_resource type="Texture2D" uid="uid://ccxdfsg5071t4" path="res://resources/bullets/chain-gun/Chain_Gun.webp" id="2_j74mc"]
+[ext_resource type="PackedScene" uid="uid://dlaks67h2osms" path="res://components/Weapons/ChainGun.tscn" id="3_0nqrh"]
+
+[node name="ChainGun" instance=ExtResource("1_7uifb")]
+avatarTexture = ExtResource("2_j74mc")
+displayName = "链式机枪"
+quality = 3
+topic = 8
+weapons = Array[PackedScene]([ExtResource("3_0nqrh")])
+costs = Array[int]([0, 3])
+costCounts = Array[int]([400, 2000])
+
+[node name="avatar" parent="container/info" index="0"]
+texture = ExtResource("2_j74mc")
+
+[node name="name" parent="container/info" index="1"]
+displayName = "链式机枪"
+quality = 4
+topic = 8