Revert "remove IRS menu"

This reverts commit 1dafa2748c.

sphaira/source/app.cpp

@@ -7,6 +7,7 @@
 #include "ui/error_box.hpp"
 
 #include "ui/menus/main_menu.hpp"
+#include "ui/menus/irs_menu.hpp"
 #include "ui/menus/themezer.hpp"
 #include "ui/menus/ghdl.hpp"
 #include "ui/menus/usb_menu.hpp"
@@ -1540,6 +1541,10 @@ void App::DisplayMiscOptions(bool left_side) {
             App::Push(std::make_shared<ui::menu::gc::Menu>());
         }));
     }
+
+    options->Add(std::make_shared<ui::SidebarEntryCallback>("Irs (Infrared Joycon Camera)"_i18n, [](){
+        App::Push(std::make_shared<ui::menu::irs::Menu>());
+    }));
 }
 
 void App::DisplayAdvancedOptions(bool left_side) {