Fix: How do I replace QXmlQuery and QXmlFormatter in QT6
In Qt6, the classes `QXmlQuery` and `QXmlFormatter` have been deprecated and removed. Qt6 introduced significant changes to the XML module, and you should use the new `QXmlStreamReader`, `QXmlStreamWriter`, and other relevant classes for parsing and formatting XML data. Here's how to replace `QXmlQuery` and `QXmlFormatter` with the new Qt6 XML classes: **Replacing QXmlQuery:** In Qt6, `QXmlQuery` is no longer available. You should use `QXmlStreamReader` and `QDomDocument` to read and query XML data. Here's an example of how to replace `QXmlQuery`: ```cpp // Qt6 - Replacing QXmlQuery QXmlStreamReader xmlReader(xmlData); while (!xmlReader.atEnd()) { if (xmlReader.isStartElement() && xmlReader.name() == "elementName") { // Process the element } xmlReader.readNext(); } ``` **Replacing QXmlFormatter:** In Qt6, `QXmlFormatter` is also removed. You can use `QXmlStreamWriter` for formatting XML data when creating XML documents. Here's an examp