增加 free camera，支持配置修改，增加图标

app/src/main/cpp/GakumasLocalify/config/Config.cpp

@@ -0,0 +1,24 @@
+#include <string>
+#include "nlohmann/json.hpp"
+#include "../Log.h"
+
+namespace GakumasLocal::Config {
+    bool isConfigInit = false;
+
+    bool enabled = true;
+    bool enableFreeCamera = false;
+
+    void LoadConfig(const std::string& configStr) {
+        try {
+            const auto config = nlohmann::json::parse(configStr);
+
+            enabled = config["enabled"];
+            enableFreeCamera = config["enableFreeCamera"];
+
+        }
+        catch (std::exception& e) {
+            Log::ErrorFmt("LoadConfig error: %s", e.what());
+        }
+        isConfigInit = true;
+    }
+}