Ignore output colors when TERM is dumb

[Chemaclass]

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📚 Description

Original idea: https://github.com/TypedDevs/bashunit/issues/247#issuecomment-1989603768 by @h0adp0re

✅ To-do list

• [x] I updated the CHANGELOG.md to reflect the new feature or fix

I am not 100% sure I like the changes. I think it's good to have the colors in the snapshots... any other thoughts?

[staabm]

btw: there is a "standard", see https://no-color.org/

[Chemaclass]

Closed in favor of https://github.com/TypedDevs/bashunit/pull/430