fixed limux build

src/gui/platform/linux/file_browser_linux.cpp

@@ -2,6 +2,7 @@
 
 #include "gui/platform/file_browser.hpp"
 #include <gtk/gtk.h>
+#include <filesystem>
 
 namespace file_dialogs
 {

src/gui/platform/windows/font_loader_windows.cpp

@@ -1,3 +1,4 @@
+#ifdef __WIN32
 #include "core/config/config.hpp"
 #include "gui/platform/font_loader.hpp"
 #include "imgui_internal.h"
@@ -166,3 +167,4 @@ std::vector<std::string> font_loader::get_system_fonts()
     std::sort(fonts.begin(), fonts.end());
     return fonts;
 }
+#endif