Abstracted image into optional class

include/vkcv/Buffer.hpp

include/vkcv/Core.hpp

include/vkcv/Image.hpp

modules/effects/src/vkcv/effects/BloomAndFlaresEffect.cpp

modules/material/src/vkcv/material/Material.cpp

modules/scene/src/vkcv/scene/Scene.cpp

modules/upscaling/src/vkcv/upscaling/FSRUpscaling.cpp

modules/upscaling/src/vkcv/upscaling/NISUpscaling.cpp

projects/bindless_textures/src/main.cpp

projects/fire_works/src/main.cpp

projects/first_mesh/src/main.cpp

projects/first_scene/src/main.cpp

projects/head_demo/src/main.cpp

projects/indirect_dispatch/src/AppSetup.cpp

projects/indirect_dispatch/src/MotionBlurSetup.cpp

projects/indirect_draw/src/main.cpp

projects/mesh_shader/src/main.cpp

projects/particle_simulation/src/main.cpp

projects/path_tracer/src/main.cpp

projects/rtx_ambient_occlusion/src/main.cpp