Amir Masoud Abdol 7fe2537ce2 Fix Style Plugin Example, and add some CMake Docs
A few things:

- Improved the documentation by adding a CMake section, briefly
  describing the process of adding the plugin, and placing it where it
  should be.
- Write a note about the case where the style may be overwritten at
  launch, and how to set the a new style using a CLI
- Improved the CMake build such that it creates the App Bundle
  correctly, and also works without an App Bundle as well.
- Changed the example, and plugin such that now instead of a QPushButton
  we have a QTextEdit, and change the text color.
- Replaced the application screenshot

Fixes: QTBUG-107842
Fixes: QTBUG-109227
Change-Id: I161a91b27df016ff6230fac3871b79d2dfbdf18a
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2023-01-18 14:47:12 +01:00

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "simplestyle.h"
void SimpleStyle::polish(QPalette &palette)
{
palette.setBrush(QPalette::Text, Qt::red);
}