Bug fiix import patron.xacro and append packages realsense2

src/realsense2_camera/examples/launch_from_rosbag/README.md

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+# Launching RS ROS2 node from rosbag File
+The following example allows streaming a rosbag file, saved by RealSense Viewer, instead of streaming live with a camera. It can be used for testing and repetition of the same sequence.
+```
+ros2 launch realsense2_camera rs_launch_from_rosbag.py
+```
+By default, the 'rs_launch_from_rosbag.py' launch file uses the "/rosbag/D435i_Depth_and_IMU_Stands_still.bag" rosbag file.
+
+User can also provide a different rosbag file through cmd line as follows:
+```
+ros2 launch realsense2_camera rs_launch_from_rosbag.py rosbag_filename:="/full/path/to/rosbag/file"
+```
+or
+```
+ros2 launch realsense2_camera rs_launch.py rosbag_filename:="/full/path/to/rosbag/file"
+```
+
+Additionally, the 'rosbag_loop' cmd line argument enables the looped playback of the rosbag file:
+```
+ros2 launch realsense2_camera rs_launch_from_rosbag.py rosbag_filename:="/full/path/to/rosbag/file" rosbag_loop:="true"
+```
+
+Check-out [sample-recordings](https://github.com/realsenseai/librealsense/blob/master/doc/sample-data.md) for a few recorded samples.