Option to disable coloured output

[robcaldecott]

Clear and concise description of the problem

When running tests on CI (in our case Bamboo) the default output is in colour which causes some ugly output when viewing the raw logs:

Suggested solution

Peraps disable colours when CI=true or add a new CLI option to do so.

Alternative

No response

Additional context

We're running tests for CI like this:

CI=true vitest run --coverage

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[Demivan]

We are using picocolors for coloring terminal input. You can use NO_COLOR to disable colors.
Most of the CI runners are already setting this

[robcaldecott]

Oh perfect, thanks @Demivan !

[Demivan]

If this works you can close the issue