feat(物品系统): 新增灵魂物品类型及相关功能

- 在ItemStore.gd中添加SOUL物品类型及其映射
- 在EntityBase.gd中为物品栏添加SOUL类型及其上限
- 新增灵魂物品的SVG图标及导入配置
- 为角色(KukeMC, Bear, Chick)添加灵魂掉落配置
- 在武器卡片界面添加灵魂提炼和镶嵌按钮

resources/items/soul.svg

@@ -0,0 +1 @@
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="39.96872" height="39.96872" viewBox="0,0,39.96872,39.96872"><g transform="translate(-220.01564,-160.01564)"><g fill="#ffffff" stroke="none" stroke-width="0" stroke-linecap="round" stroke-miterlimit="10"><g><g><path d="M245.88013,180.14782l-5.90839,-20.13218l-5.86641,19.98913h11.78934"/><path d="M245.88013,179.85218l-5.90839,20.13218l-5.86641,-19.98913h11.78934"/></g><g><path d="M240.14782,174.11987l-20.13218,5.90839l19.98913,5.86641v-11.78934"/><path d="M239.85218,174.11987l20.13218,5.90839l-19.98913,5.86641v-11.78934"/></g></g></g></g></svg><!--rotationCenter:19.984360513549035:19.9843606777562-->

resources/items/soul.svg.import

@@ -0,0 +1,37 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://7jhhyoinptns"
+path="res://.godot/imported/soul.svg-be1bba571183bafbd4f4f2057b205ffb.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://resources/items/soul.svg"
+dest_files=["res://.godot/imported/soul.svg-be1bba571183bafbd4f4f2057b205ffb.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false