feat: switch format:write to format --write

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes 🚀 Feature: Replace format:write with format --write #762
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Does the swap, both in code and docs.

[codecov]

Codecov Report

Merging #901 (adb14cb) into main (7623d6a) will decrease coverage by 0.01%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #901      +/-   ##
==========================================
- Coverage   93.54%   93.54%   -0.01%     
==========================================
  Files          89       89              
  Lines        4681     4680       -1     
  Branches      367      367              
==========================================
- Hits         4379     4378       -1     
  Misses        301      301              
  Partials        1        1              

Flag	Coverage Δ
create	72.28% <100.00%> (-0.01%)	⬇️
initialize	36.99% <0.00%> (+<0.01%)	⬆️
migrate	71.08% <100.00%> (-0.01%)	⬇️
unit	66.01% <100.00%> (-0.01%)	⬇️

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Files	Coverage Δ
...ps/writing/creation/dotGitHub/createDevelopment.ts	100.00% <100.00%> (ø)
src/steps/writing/creation/writePackageJson.ts	100.00% <ø> (ø)

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[github-actions]

🎉 This is included in version v1.32.0 🎉

The release is available on:

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

Cheers! 📦🚀