GH-108852: Add support for Nushell on virtual environment creation

[hyiltiz]

Add support for Nushell on virtual environment creation

• Issue: 108852

Script originally contributed by @elferherrera and updated by the community (@melMass @fdncred @tusharsadhwani @kubouch @m-lima @WindSoilder @sophiajt @jimporter) to the Virtualenv project [4].

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In light of some recent updates in Nushell development, we may be approaching a time to provide support for Nushell:

• Nushell users has been in increasing steadily and uses it in personal and work environments as it is quite stable [1].
• This script is fully tested as part of virtualenv and was stable since May 17, 2023 [2]. During this time, Nushell had 13 minor updates, none of which broke compatility and none required an update to this script [3].

[1] https://www.nushell.sh/blog/2023-11-16-nushell-2023-survey-results.html
[2] pypa/virtualenv#2572
[3] nushell/nushell#9212
[4] https://github.com/pypa/virtualenv/commits/main/src/virtualenv/activation/nushell/activate.nu

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[hyiltiz]

Accidental PR. Please remove if needed.