Add "Einstellungen" interface and improve Lua execution flow

Introduced a new "Einstellungen" (Settings) interface with an HTML page and integrated it into the application workflow. Enhanced Lua execution handling with optional console output and improved UI updates. Adjusted installer UI to better align buttons and icons with user experience.

inc/toolboxWindow.h

@@ -72,4 +72,8 @@ private:
     void open_file_system();
 
     void SetJsonItems();
+
+    void openEinst();
+
+    void openIndex();
 };