[MacPorts] #56022: Colors in the port command

[MacPorts]

#56022: Colors in the port command
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  Reporter:  g5pw    |      Owner:  g5pw
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:  MacPorts 2.7.0
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:          |
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Comment (by satraul):

 Some ideas:
 * Emphasize importance such as red for `ui_error`, yellow for `ui_warn`,
 gray for `UI_PREFIX` (`-->`)
 * Emphasize portnames in actions like install

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Ticket URL: <https://trac.macports.org/ticket/56022#comment:3>
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