wip: moved files to new structure

quad/src/quad_app/commands.c

quad/src/quad_app/commands.h

quad/src/quad_app/communication.c

quad/src/quad_app/communication.h

quad/src/quad_app/computation_graph.c

quad/src/quad_app/computation_graph.h

quad/src/quad_app/control_algorithm.c

quad/src/quad_app/control_algorithm.h

quad/src/quad_app/controllers.c

quad/src/quad_app/controllers.h

quad/src/quad_app/conversion.c

quad/src/quad_app/conversion.h

quad/src/quad_app/gam.h

quad/src/quad_app/graph_blocks/node_add.c

quad/src/quad_app/graph_blocks/node_add.h

quad/src/quad_app/graph_blocks/node_constant.c

quad/src/quad_app/graph_blocks/node_constant.h

quad/src/quad_app/hw_iface.h

quad/src/quad_app/iic_utils.c

quad/src/quad_app/iic_utils.h