drawing reworked into c++ plugin, moved input handler to Interactions.qml as a PointHandler

Plugins/ZShell/Internal/strokecanvasrenderer.hpp

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <QCanvasPainterItemRenderer>
+#include "stroke.hpp"
+
+namespace ZShell::internal {
+
+class StrokeCanvasRenderer final : public QCanvasPainterItemRenderer {
+
+public:
+void synchronizeData(QCanvasPainterItem *item) override;
+void paint(QCanvasPainter *painter) override;
+
+private:
+QColor m_penColor;
+float m_penWidth = 4.f;
+
+QVector<Stroke> m_strokes;
+Stroke m_currentStroke;
+
+};
+
+};