fix: allow chmod to fail in setup

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes 🐛 Bug: Setup script crashes with 'Error writing structure' #1195
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Wraps the chmod with a try/catch. I figure if it fails then that's probably a sign the running OS doesn't have it and therefore doesn't need it.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ff5f7fd) 94.68% compared to head (4ecd099) 94.69%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1197   +/-   ##
=======================================
  Coverage   94.68%   94.69%           
=======================================
  Files         102      102           
  Lines        5685     5689    +4     
  Branches      466      468    +2     
=======================================
+ Hits         5383     5387    +4     
  Misses        301      301           
  Partials        1        1           

Flag	Coverage Δ
create	70.26% <50.00%> (-0.04%)	⬇️
initialize	42.47% <0.00%> (-0.04%)	⬇️
migrate	69.82% <50.00%> (-0.04%)	⬇️
unit	73.82% <100.00%> (+0.12%)	⬆️

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[JoshuaKGoldberg]

Test failures are unrelated: #877.

[github-actions]

🎉 This is included in version v1.52.7 🎉

The release is available on:

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

Cheers! 📦🚀