Add ascii-friendly option.

[jose1711]

Description

Add an "ASCII-Friendly Prompt" option as the first step of the tide configure wizard. When selected, it replaces all Nerd Font glyphs and powerline characters with plain ASCII equivalents throughout the configuration flow, and skips glyph-dependent steps (icons, prompt separators, heads, tails).

Motivation and Context

Tide's default configuration assumes Nerd Fonts are installed and the terminal supports powerline glyphs. Users on minimal setups - SSH sessions, TTYs, CI environments, or terminals without patched fonts - would previously get a prompt full of broken/missing characters with no easy way to configure around it.

Screenshots (if appropriate)

How Has This Been Tested

Installed via fisher and tried to configure various options.

• I have tested using Linux.
• I have tested using MacOS.

Checklist

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

[plttn]

Hey @jose1711, I think in this case since it's not really a new prompt item, this might instead be better served by documentation on how to update the various prompt icons to not use Nerd Fonts.

Additionally, this also doesn't impact any item icons, which means those would still be missing if used without Nerd Fonts. I think the Nerd Font deployment rate (or terminals that automatically fall back to Nerd Fonts if the selected font doesn't have the code point) is much higher than it was when your only real option was Meslo patched.