build system and module refactoring + simple histogram scratch (#20)

* scratch adding histogram to image views

Histograms should come from some sort of histogram service. This is
currently just a POC.

* custom logger implementation w/o spdlog

* missing cmake file

* fix tests

* use operator<< over direct stream exposure

* rm print header

* add threading test + refactor towards interface libraries

omits the need for =target_include_directories= calls /everywhere/

* rm print header

* rm constexpr

* templated thread_pool

* fix doxyfile

* default enable doc building

* czi reader refactor

* rm erroneous include expression

* clang-format

* single lib include with PUBLIC visibility

* compile imgui stdlib

* clang format

* documentation update

centralize `LogLevelToString` to `ILog.hpp`

update docs and examples

lib/app/DefaultApp.cpp

@@ -3,12 +3,12 @@
 #include <cstddef>
 #include <format>
 
+#include "ILog.hpp"
 #include "PixelariumImageFactory.hpp"
 #include "app_resources_default.h"
 #include "imgui.h"
 #include "portable-file-dialogs.h"
-#include "resources/resource.hpp"
-#include "utilities/ILog.hpp"
+#include "resource.hpp"
 
 using namespace pixelarium::imaging;
 using namespace pixelarium::application;