feat: add --words with default from cspell.json words

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes 🐛 Bug: Transition mode clobbers cspell.json words #2020
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Adds a words?: string[] option that defaults to reading cspell.json as JSON. blockCSpell will add in any words from it to what it produces.

🎁

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.80%. Comparing base (bab5313) to head (eb16196).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2021   +/-   ##
=======================================
  Coverage   99.80%   99.80%           
=======================================
  Files         114      115    +1     
  Lines        4618     4639   +21     
  Branches      289      292    +3     
=======================================
+ Hits         4609     4630   +21     
  Misses          9        9           

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[github-actions]

🎉 This is included in version v2.12.0 🎉

The release is available on:

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

Cheers! 📦🚀