feat: allow file creations to be [string, { mode }]

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes 🚀 Feature: Allow attaching metadata to created files #28
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Allows file creations to be [string, { mode?: number }] per the issue.

Note that this only unit tests the production areas, not runtime (currently: applyCreation -> applyFilesToSystem). Runner APIs haven't been fleshed out yet. That's tracked separately in #21.

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Name	Status	Preview	Comments	Updated (UTC)
create	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 9, 2024 9:09pm

[codecov]

Codecov Report

Attention: Patch coverage is 96.49123% with 6 lines in your changes missing coverage. Please review.

Project coverage is 76.49%. Comparing base (50b99d3) to head (7ccf30d).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ages/create/src/cli/applying/applyFilesToSystem.ts	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
+ Coverage   74.30%   76.49%   +2.18%     
==========================================
  Files          62       65       +3     
  Lines        1483     1621     +138     
  Branches      206      238      +32     
==========================================
+ Hits         1102     1240     +138     
  Misses        367      367              
  Partials       14       14              

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