Replaced camera indices with camera handles

modules/camera/include/vkcv/camera/CameraHandle.hpp

modules/camera/include/vkcv/camera/CameraManager.hpp

modules/camera/include/vkcv/camera/ControllerType.hpp

modules/camera/src/vkcv/camera/CameraManager.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/first_triangle/src/main.cpp

projects/head_demo/src/main.cpp

projects/indirect_dispatch/src/App.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

projects/saf_r/src/main.cpp

projects/sph/src/main.cpp

projects/voxelization/src/main.cpp

projects/wobble_bobble/src/main.cpp