[Feature-Request] Missing standard (?) frame camera_depth_optical_frame

[flabrosse]

rtabmap requires the frame camera_depth_optical_frame as the frame for the depth image. There seems to be no way to configure this in rtabmap. Other cameras provide this frame, such as the realsense, the gazebo kinect driver and probably the ZED (although I cannot check this right now).

It is obviously easy to add a static transform from a provided frame to the needed one, but it would be even better integration if the depthai-ros driver would conform to what seems to be a standard naming of camera frames. There are other frames that seem to be standard, such as camera_color_optical_frame and camera_imu_optical_frame.