Proper image rendering ux (#5)

* can draw from selection

* add light-weight render manager to render many images simultaneously

* [debug me] currently the image close button does not do

* the unselected image can be closed now

* can close images and manually open them on demand

* cosmetic

* image view stuff in render subdirectory

* cosmetic

* generate docs

* review

windows support

some cosmetics

💅 and pin libCZI module

lib/rendering/PixelariumImageView.hpp

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <memory>
+
+#include "imaging/PixelariumImage.hpp"
+#include "imgui.h"
+#include "rendering/CvMatRender.hpp"
+
+namespace pixelarium::render
+{
+class PixelariumImageView
+{
+    using Image = imaging::PixelariumImage;
+    using Render = render::CvMatRender;
+
+   public:
+    explicit PixelariumImageView(const std::shared_ptr<Image>& img) : img_(img) { render_ = Render(img_); }
+    PixelariumImageView() = delete;
+    PixelariumImageView(PixelariumImageView&) = delete;
+    PixelariumImageView(const PixelariumImageView&) = delete;
+    PixelariumImageView(PixelariumImageView&&) = delete;
+    PixelariumImageView& operator=(PixelariumImageView&) = delete;
+    PixelariumImageView& operator=(PixelariumImageView&&) = delete;
+
+    // void ToggleView(bool target) { open_p = target; }
+    const bool* GetStatus() const noexcept { return &this->open_p; }
+    void ShowImage();
+
+   private:
+    const std::shared_ptr<Image> img_;
+    Render render_;
+    bool open_p{true};
+    ImVec2 curr_dim_{};
+};
+}  // namespace pixelarium::render