Added demos.

doc/claude_fluent_light/main.cpp

@@ -0,0 +1,37 @@
+
+// main.cpp
+#include <QApplication>
+
+#include <QWidget>
+#include <QPushButton>
+#include <QLabel>
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QGridLayout>
+#include <QPainter>
+#include <QMouseEvent>
+#include <QPropertyAnimation>
+#include <QGraphicsDropShadowEffect>
+#include <QLineEdit>
+#include <QSlider>
+#include <QCheckBox>
+
+#include "FluentWidget.h"
+
+int main(int argc, char *argv[])
+{
+  QApplication app(argc, argv);
+
+  // Set font
+  QFont font;
+  font.setFamily("Segoe UI");
+  font.setPointSize(9);
+  app.setFont(font);
+
+  FluentWidget window;
+  window.setWindowTitle("Fluent Design Demo");
+  window.resize(1000, 800);
+  window.show();
+
+  return app.exec();
+}