feat: switch from sentences-per-line to markdownlint-sentences-per-line

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes 🚀 Feature: Update from sentences-per-line to markdownlint-sentences-per-line #2283
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Direct package rename from sentences-to-line to markdownlint-sentences-per-line.

As noted in #2283, this is a partial step along the way to streamlining this repo's Markdown linting.

🎁

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.78%. Comparing base (8d3967b) to head (41b5d52).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2284   +/-   ##
=======================================
  Coverage   99.78%   99.78%           
=======================================
  Files         136      136           
  Lines        6123     6123           
  Branches      511      511           
=======================================
  Hits         6110     6110           
  Misses         13       13           

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[github-actions]

🎉 This is included in version v2.48.0 🎉

The release is available on:

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

Cheers! 📦🚀