feat(资源加载): 替换stb_image为SDL_image并添加脚本解析功能

- 将stb_image替换为SDL_image以解决Switch平台兼容性问题
- 添加PVF资源包解析器和脚本解析器功能
- 修改各平台配置文件添加SDL_image依赖
- 更新纹理加载逻辑使用SDL_image API
- 新增脚本解析相关类用于处理游戏脚本数据

platform/switch.lua

@@ -40,9 +40,9 @@ target("Frostbite2D")
     add_includedirs(path.join(devkitPro, "portlibs/switch/include/SDL2"))
     add_linkdirs(path.join(devkitPro, "portlibs/switch/lib"))
 
-    add_syslinks("SDL2_mixer", "SDL2", "opusfile", "opus", "vorbisidec", "ogg",
-                         "modplug", "mpg123", "FLAC", "GLESv2", "EGL", "glapi", "drm_nouveau",
-                         {public = true})
+    add_syslinks("SDL2_mixer", "SDL2_image", "SDL2", "webp", "png", "jpeg", "z", "opusfile", "opus", "vorbisidec", "ogg",
+                          "modplug", "mpg123", "FLAC", "GLESv2", "EGL", "glapi", "drm_nouveau",
+                          {public = true})
     add_syslinks("nx", "m")