feat: add --bin option

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes 🚀 Feature: Add a --bin option for projects with a bin runner #938
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Adds the --bin option with auto-detection from existing package.json contents.

Doesn't do anything about investigating whether to adjust pnpm build before pnpm lint & similar. That can be a followup.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (3cba74b) 74.63% compared to head (bacb5fa) 94.17%.
Report is 5 commits behind head on main.

Files	Patch %	Lines
src/shared/types.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1068       +/-   ##
===========================================
+ Coverage   74.63%   94.17%   +19.54%     
===========================================
  Files          91       96        +5     
  Lines        5413     5564      +151     
  Branches      209      446      +237     
===========================================
+ Hits         4040     5240     +1200     
+ Misses       1368      323     -1045     
+ Partials        5        1        -4     

Flag	Coverage Δ
create	70.67% <100.00%> (?)
initialize	41.83% <88.88%> (+0.07%)	⬆️
migrate	69.83% <100.00%> (+0.04%)	⬆️
unit	72.03% <81.81%> (?)

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[github-actions]

🎉 This is included in version v1.48.0 🎉

The release is available on:

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

Cheers! 📦🚀