Add rosetta item when running translated

Description

This adds a rosetta item. When added to the prompt, it checks if running we are running translated (x86_64 emulation on arm64 on Apple Silicon).

It'll show  x86_64 when added and running translated.

Motivation and Context

When looking into game porting toolkit, there is an optional guide of having both x86 and arm64 homebrew installed.

When running fish using:

arch -x86_64 /usr/bin/local/fish

It doesn't have a visual indicator by default that you're not in native fish.

Screenshots (if appropriate)

When using set --prepend tide_left_prompt_items rosetta with base16 colors translated:

Not translated:

How Has This Been Tested

Tested locally on macOS. This is not intended to be used with Linux, but could be adapted to do so.

• [ ] I have tested using Linux.
• [x] I have tested using MacOS.

Checklist

• [x] I am ready to update the wiki accordingly.
• [ ] I have updated the tests accordingly.