support and honor NO_COLOR env variable

[Loki-Afro]

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NO_COLOR is de-facto standard and it frustrates me when some libs, tools wahtever don't support it

Describe the solution you'd like
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honor NO_COLOR=true

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none

see also https://no-color.org/

[dmonad]

There's already the --no-colors parameter that disables colors. But if there's a website for NO_COLOR, then I have to honor it. This is implemented in the latest release.