Logger: Add color support for different log levels (#4931)

No related issue

config/config.example.yml

@@ -233,6 +233,17 @@ http_proxy:
 ##
 #log_level: Info
 
+##
+## Enables colors in logs. Useful for debugging purposes
+## This is overridden if "-k" or "--colorize"
+## are passed on the command line.
+## Colors are also disabled if the environment variable
+## NO_COLOR is present and has any value
+##
+## Accepted values: true, false
+## Default: true
+##
+#colorize_logs: false
 
 # -----------------------------
 #  Features