WIP Operator refactor

CMakeLists.txt

applications/reconstruct/CMakeLists.txt

applications/reconstruct/src/main.cpp

components/operators/CMakeLists.txt

components/operators/include/ftl/operators/colours.hpp

components/operators/include/ftl/operators/operator.hpp

components/operators/include/ftl/operators/smoothing.hpp

components/operators/src/colours.cpp

components/operators/src/operator.cpp

components/operators/src/smoothing.cpp

components/renderers/cpp/include/ftl/render/tri_render.hpp

components/renderers/cpp/src/tri_render.cpp