Right click menu support for project buttons (#6122)

Signed-off-by: Alex Peterson <26804013+AMZN-alexpete@users.noreply.github.com>

Code/Tools/ProjectManager/Source/ProjectButtonWidget.h

@@ -24,6 +24,7 @@ QT_FORWARD_DECLARE_CLASS(QProgressBar)
 QT_FORWARD_DECLARE_CLASS(QLayout)
 QT_FORWARD_DECLARE_CLASS(QVBoxLayout)
 QT_FORWARD_DECLARE_CLASS(QEvent)
+QT_FORWARD_DECLARE_CLASS(QMenu)
 
 namespace O3DE::ProjectManager
 {
@@ -49,7 +50,7 @@ namespace O3DE::ProjectManager
         QLayout* GetBuildOverlayLayout();
 
     signals:
-        void triggered();
+        void triggered(QMouseEvent* event);
 
     public slots:
         void mousePressEvent(QMouseEvent* event) override;
@@ -108,6 +109,8 @@ namespace O3DE::ProjectManager
         void ShowWarning(bool show, const QString& warning);
         void ShowDefaultBuildButton();
 
+        QMenu* CreateProjectMenu();
+
         ProjectInfo m_projectInfo;
 
         LabelButton* m_projectImageLabel = nullptr;