Misc (#19)

* get image returns optional<Mat> instead of unique_ptr<Mat>

* introduce complexity

* rename image load function

* add example for a basic reader for binary image files

* fix windows build?

* add a status bar underneath the menu bar

* use status bar in custom_0 example app

* clang formats

* packing w/ pragma push

* add "Save As" functions to image views

* resize over reserve

* rm local override uri

* add simple thread pool

* rename to simple_thread_pool

* get rid of useless renderlib

* document version inc

* extract hardcoded values to in-header

* clang format patch

* clone registered image in custom_0

* document binary-file header

* minor fixes

* clang format

* rm unused render cmake

lib/app/PixelariumGallery.cpp

@@ -23,7 +23,7 @@ void PixelariumImageGallery::RenderGallery()
     if (ImGui::BeginListBox("Image List", ImVec2(200, 400)))
     {
         pool_.EnumerateResources(
-            [&](size_t id, size_t idx, const imaging::IPixelariumImage& img) -> void
+            [&](size_t id, size_t idx, const imaging::IPixelariumImage<cv::Mat>& img) -> void
             {
                 const bool is_selected = selected_index == idx;
                 if (ImGui::Selectable(std::format("{}", img.Name()).c_str(), is_selected))
@@ -74,7 +74,7 @@ void PixelariumImageGallery::RenderGallery()
 void PixelariumImageGallery::RenderImages()
 {
     this->render_manager_->Enumerate(
-        [&](resources::ResourceKey key, render::RenderImageStateWrapper& render_state)
+        [&](resources::ResourceKey key, application::RenderImageStateWrapper& render_state)
         {
             render_state.view->ShowImage();