refactor: 更新json库引用路径为nlohmann/json

统一将项目中所有json/json.hpp引用改为nlohmann/json.hpp，并清理不再需要的头文件路径配置

Extra2D/src/effects/custom_effect_manager.cpp

@@ -1,7 +1,7 @@
 #include <extra2d/effects/custom_effect_manager.h>
 #include <extra2d/utils/logger.h>
 #include <fstream>
-#include <json/json.hpp>
+#include <nlohmann/json.hpp>
 #include <sstream>
 
 namespace extra2d {

docs/API_Tutorial/04_Resource_Management.md

@@ -267,7 +267,7 @@ private:
 ```cpp
 // ResLoader.cpp
 #include "ResLoader.h"
-#include <json/json.hpp>
+#include <nlohmann/json.hpp>
 
 namespace flappybird {
 

examples/flappy_bird/ResLoader.cpp

@@ -3,7 +3,7 @@
 // ============================================================================
 
 #include "ResLoader.h"
-#include <json/json.hpp>
+#include <nlohmann/json.hpp>
 
 namespace flappybird {
 

examples/flappy_bird/xmake.lua

@@ -11,7 +11,6 @@ target("flappy_bird")
     set_kind("binary")
     add_files("*.cpp")
     add_includedirs("../../Extra2D/include")
-    add_includedirs("../../Extra2D/include/json")
     add_deps("extra2d")
 
     -- 使用与主项目相同的平台配置

xmake/engine.lua

@@ -23,9 +23,7 @@ function define_extra2d_engine()
         
         -- 第三方库头文件路径
         add_includedirs("third_party/glad/include", {public = true})
-        add_includedirs("third_party/nlohmann", {public = true})
+        add_includedirs("third_party", {public = true})
-        add_includedirs("third_party/simpleini", {public = true})
-        add_includedirs("third_party/stb", {public = true})
 
         -- 平台配置
         local plat = get_current_plat()