Display sensor_msgs/Imu messages in the 3D panel

[esthersweon]

Requested by Studio user @Balussery in Slack; visualizing this is currently possible in rviz.

Example:

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[ljburtz]

IMU messages are important to debug/develop localization applications = huge use case for foxglove currently using the RVIZ display and the plotjuggler automatic calculation of roll / pitch / yaw from the ROS standard quaternion for plots

would love to see this in foxglove!