Improve cmake and GUI (#13)

+ Packaging and CI for Windows, Mac, Linux
+ Debian package, NSIS Windows installer, OSX appbundle
+ Example application using libqtk
+ Component installation for `qtk`, `libqtk`, or `collection` with cmake

src/app/toolbox.h

@@ -0,0 +1,42 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2023 Shaun Reed, all rights reserved                ##
+## About: Toolbox plugin for object details and options                       ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef TOOLBOX_H
+#define TOOLBOX_H
+
+#include <QDesignerExportWidget>
+#include <QDockWidget>
+
+namespace Ui {
+  class ToolBox;
+}
+
+namespace Qtk {
+  class ToolBox : public QDockWidget {
+      Q_OBJECT
+
+    public:
+      /*************************************************************************
+       * Contructors / Destructors
+       *************************************************************************/
+
+      explicit ToolBox(QWidget * parent = nullptr);
+
+      ~ToolBox();
+
+    private:
+      /*************************************************************************
+       * Private Members
+       ************************************************************************/
+
+      Ui::ToolBox * ui;
+  };
+}  // namespace Qtk
+
+#endif  // TOOLBOX_H