Post processing filters

[BarzelS]

Can the following filters be used like in ROS1?

https://github.com/IntelRealSense/librealsense/blob/master/doc/post-processing-filters.md

• disparity - convert depth to disparity before applying other filters and back.
• spatial - filter the depth image spatially.
• temporal - filter the depth image temporally.
• hole_filling - apply hole-filling filter.
• decimation - reduces depth scene complexity.