Misc Improvements (#7)

* get rid of optional<ptr> -> double indirection

* more optional cleanup

* fix

* add more render pixel type options

* towards different views

* missing virtual declaration of ShowImage

* fix runtime

* init image view factory

* fix build

Render Image close button re-enable

add readme

init documentation

use awesomeDoxygen

ci build docs

install doxygen

id token permission

add pages write permission

lib/rendering/IPixelariumImageView.hpp

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <memory>
+
+#include "imaging/IPixelariumImage.hpp"
+#include "rendering/CvMatRender.hpp"
+
+namespace pixelarium::render
+{
+class IPixelariumImageView
+{
+   public:
+    virtual ~IPixelariumImageView() = default;
+    virtual void ShowImage() = 0;
+
+    // default implemented
+   public:
+    virtual const bool* GetStatus() const noexcept { return &this->open_p; }
+    virtual void ForceUpdate() noexcept { this->is_dirty_ = true; }
+
+   protected:
+    std::shared_ptr<imaging::IPixelariumImage> img_{};
+    std::unique_ptr<cv::Mat> cached_image_{};
+    render::CvMatRender render_;
+    bool open_p{true};
+    bool is_dirty_{true};
+};
+}  // namespace pixelarium::render