chore: improve variable naming of helpers module

[ST-DDT]

Preparation for #2439

• Check eslint-plugin-unicorn rules to enable/configure/disable #2439

Related:

• chore: align coding style of deprecated.ts #3312
• chore: align coding style of lorem module #3313
• chore: align variable naming style of internet user agent #3314
• chore: improve variable naming of system module #3315
• chore: improve variable naming of helpers module #3316
• chore: improve parameter naming of internet module #3317
• chore: improve parameter naming of keys.ts #3318
• chore: align coding style of word module #3319

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Improves the variable naming in the helpers module.
Feel free to suggest better names.

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This change is split from the no abbreviation lint PR, to reduce diff and I consider this slightly more valid than most of the other changes required for that.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.97%. Comparing base (ff6dda9) to head (54058ef).
Report is 1 commits behind head on next.

Additional details and impacted files

@@           Coverage Diff           @@
##             next    #3316   +/-   ##
=======================================
  Coverage   99.97%   99.97%           
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  Files        2811     2811           
  Lines      217012   217012           
  Branches      939      937    -2     
=======================================
  Hits       216961   216961           
  Misses         51       51           

Files with missing lines	Coverage Δ
src/modules/helpers/index.ts	96.71% <100.00%> (ø)