basic support for colors and bold/bright

[PeterMitrano]

I ported this from #26 to rolling :)

Motivation

I like to print things with color, using Colorama in python this is super easy.

from colorama import Fore, Style, init
import colorama
colorama.init(autoreset=True)
rospy.loginfo(Fore.RED + Style.BRIGHT + "bold and red!")

However, this would shows up in the rqt console with no color and lots of ugly ansi codes

What this does

makes foreground/background color and bold work, via the standard model/view abstraction mechanisms. One pitfall could be the regex I came up with it. It's possible it has false positives.

Here's a screenshot of what it looks like for me with some test logs messages

[peter-mitrano-ar]

Another example , you can reproduce it by running this example from ros2_control_demos

ros2 launch ros2_control_demo_example_7 r6bot_controller.launch.py gui:=false

[arne48]

Hello @PeterMitrano ,
Thank you very much for contributing to this package.
Eye-candy is always a nice way to improve the user-experience.
So generally I would like to merge it.
I think it would also beneficial, if there is an option (tick-box) to control (enable/disable) this new behavior.
Would it be possible for you to extend your PR with this functionality?