Colored JSON logs

[brutus333]

Is your feature request related to a problem? Please describe.
Since all our logs are issued in the JSON format, we needed a way to see them in a nice way in k9s.

Describe the solution you'd like
I already implemented a simple solution which is preserving JSON format but adds pretty printing and coloring to the output.

Describe alternatives you've considered
I tried the jq-based plugin but it is not so good since it is piping the output of the kubectl command to jq and to less, making the navigation through the logs less intuitive and k9s-native.

Additional context
A PR will follow.
This functionality might overlap partially the one, more involved, of PR: #2973. However, I believe a simpler solution might also have it's place in k9s.