Include basic Doxygen config in all packages.

franka_control/mainpage.dox

franka_control/rosdoc.yaml

franka_example_controllers/mainpage.dox

franka_example_controllers/rosdoc.yaml

franka_gripper/mainpage.dox

franka_gripper/rosdoc.yaml

franka_hw/mainpage.dox

franka_hw/rosdoc.yaml

franka_moveit_config/mainpage.dox

franka_moveit_config/rosdoc.yaml

franka_msgs/mainpage.dox

franka_msgs/rosdoc.yaml

franka_visualization/mainpage.dox

franka_visualization/rosdoc.yaml