🚀 Feature: --mode migrate should prompt for the base

[JoshuaKGoldberg]

Bug Report Checklist

• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Overview

Splitting out of #1355: running npx create-typescript-app --mode migrate doesn't explicitly call out what the inferred --base is on. You can only see it by looking at the rerun suggestion.

●  Tip: to run again with the same input values, use: npx create-typescript-app --mode migrate --base minimum --access public --author danvk --description "Code samples that scale" --directory literate-ts --email-github [email protected] --email-npm [email protected] --mode migrate --owner danvk --repository literate-ts --title "Literate TS"

...but that leads to broken expectations when the inferred base doesn't match what the user would expect. And if it defaults to --base minimum, that's a lot of missing functionality!

Migration should prompt the user for the --base. I was surprised to see it default to minimum.

Additional Info

Co-authored-by: @danvk

[JoshuaKGoldberg]

Good news: now that this is onboarded to Bingo, it does prompt for the preset now (formerly called base)!

npx create-typescript-app@beta
┌  ✨ [email protected] ✨
│
●  Learn more on:
│    https://github.com/JoshuaKGoldberg/create-typescript-app
│
│  Running with mode --transition using the template:
│    create-typescript-app
│
■  What will the starting set of tooling to use be? (--preset)

In fact, the opposite feature request is now relevant again, inferring a preset from an existing repo: JoshuaKGoldberg/bingo#237