feat: added --auto mode

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes 🚀 Feature: Add an --auto mode #1042
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Adds extra logic to getPrefillOrPromptedOption so that it can return immediately without prompting if needed.

[codecov]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (e3eef39) 92.63% compared to head (56b19b3) 94.19%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/shared/options/readOptions.ts	89.47%	8 Missing ⚠️
src/shared/types.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1046      +/-   ##
==========================================
+ Coverage   92.63%   94.19%   +1.56%     
==========================================
  Files          95       96       +1     
  Lines        5444     5551     +107     
  Branches      425      446      +21     
==========================================
+ Hits         5043     5229     +186     
+ Misses        400      321      -79     
  Partials        1        1              

Flag	Coverage Δ
create	70.61% <41.05%> (-0.15%)	⬇️
initialize	41.73% <42.38%> (?)
migrate	69.78% <41.05%> (-0.06%)	⬇️
unit	72.00% <93.42%> (+0.45%)	⬆️

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[github-actions]

🎉 This is included in version v1.46.0 🎉

The release is available on:

• GitHub releases
• npm package (@latest dist-tag)

Cheers! 📦🚀