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/app/CMakeLists.txt

@@ -1,9 +1,10 @@
-set(PIXELARIUM_TITLE ${CMAKE_PROJECT_NAME})
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/app_resources_default.h.in
   ${CMAKE_BINARY_DIR}/app_resources_default.h @ONLY)
 
 set(APPLIBSRC
+  AppGLFW.hpp
   AppGLFW.cpp
+  DefaultApp.hpp
   DefaultApp.cpp
   ${imgui_DIR}/imgui.cpp
   ${imgui_DIR}/imgui_demo.cpp