[wip] Progress-bar for ros2 bag play

[nicolaloi]

Addresses #1762: Adds a progress bar for ros2 bag play, showing the bag time and duration, similar to what is seen in ROS1.

In ROS1, the progress bar was easy to handle because the rosbag play command didn't print additional output during playback. However, in ROS2, many logs can be printed during playback (e.g., keyboard control logs).

The progress bar is printed and continuously updated on the last line of the playback output. I have tested this initial implementation with keyboard controls (play, pause, play next, set rate), Ctrl+C, throwing an exception, and the flags --log-level debug, --delay X, and --start-offset X.

To try it, use the new --progress-bar flag when playing a bag.

[nicolaloi]

video-example.mp4

(at 2.6-2.7 seconds of bag duration, the progress bar is slightly updating while in paused state because I was clicking the left arrow for the play next keyboard control)

Since ros2 bag play generates more logs than its ROS1 counterpart, the key aspect of this PR is to print a string shorter than any potential log message not coming from rosbag2_player. For example, with the current draft of the progress bar, this prints nicely:

[INFO] [1729028986.845909253] [rosbag2_player]: Pausing play.
 Bag Time 1718553782.525239  Duration 1.272325/6.974378 [P]

while this longer version of the progress bar doesn't work properly without extra line clearing (in this case, it's easy to clear the line since the logs come from rosbag2_player., but for "external" logs, this becomes more difficult):

[INFO] [1729028986.845909253] [rosbag2_player]: Pausing play.us:Running]
 Bag Time 1718553782.525239  Duration 1.272325/6.974378 [status:Paused]

@MichaelOrlov looking forward to your feedback, for now I have made a test MVP code to check the feasibility of the feature.