feat(窗口图标): 添加窗口图标支持并完善相关资源处理

添加窗口图标功能，包括：
1. 支持通过配置文件设置窗口图标
2. 添加Windows资源文件处理
3. 更新各平台构建脚本以处理图标资源
4. 添加图标使用文档说明
5. 优化Application类结构

同时修复了Switch平台构建脚本中的团队名称错误

platform/switch.lua

@@ -50,14 +50,16 @@ target("Frostbite2D")
         local nro_file = path.join(output_dir, "hello_world.nro")
         local nacptool = path.join(devkitPro, "tools/bin/nacptool.exe")
         local elf2nro = path.join(devkitPro, "tools/bin/elf2nro.exe")
+        local icon_file = path.join(os.projectdir(), "assets/icons/icon.bmp")
 
         if os.isfile(nacptool) and os.isfile(elf2nro) then
-            os.vrunv(nacptool, {"--create", "Hello World", "Extra2D Team", "1.0.0", nacp_file})
+            os.vrunv(nacptool, {"--create", "Hello World", "Frostbite2D Team", "1.0.0", nacp_file})
             local romfs = path.join(example_dir, "romfs")
+            local icon_param = os.isfile(icon_file) and ("--icon=" .. icon_file) or ""
             if os.isdir(romfs) then
-                os.vrunv(elf2nro, {elf_file, nro_file, "--nacp=" .. nacp_file, "--romfsdir=" .. romfs})
+                os.vrunv(elf2nro, {elf_file, nro_file, "--nacp=" .. nacp_file, icon_param, "--romfsdir=" .. romfs})
             else
-                os.vrunv(elf2nro, {elf_file, nro_file, "--nacp=" .. nacp_file})
+                os.vrunv(elf2nro, {elf_file, nro_file, "--nacp=" .. nacp_file, icon_param})
             end
             print("Generated NRO: " .. nro_file)
         end