feat(eslint-plugin): add *-type-checked-only configs

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes Configs: Provide configs that only have type-checked rules #8195
• That issue was marked as accepting prs
• Steps in Contributing were taken

Overview

Adds recommended-type-checked-only, strict-type-checked-only, and stylistic-type-checked-only configs, along with corresponding docs.

Also simplifies the writeExtendedConfig function a teeny bit, while I'm in the area.

[typescript-eslint]

Thanks for the PR, @JoshuaKGoldberg!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

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✅ Successfully ran 33 targets

• nx test eslint-plugin
• nx test type-utils
• nx test typescript-estree
• nx run types:build
• nx test repo-tools
• nx run repo-tools:postinstall-script
• nx test visitor-keys
• nx test utils
• nx test typescript-eslint
• nx test scope-manager
• nx test parser
• nx test rule-schema-to-typescript-types
• nx test eslint-plugin-tslint
• nx test eslint-plugin --coverage=false
• nx test eslint-plugin-internal
• nx test typescript-eslint --coverage=false
• nx test ast-spec
• nx run-many --target=build --parallel --exclude=website --exclude=website-eslint
• nx run-many --target=lint --parallel
• nx test typescript-estree --coverage=false
• nx test visitor-keys --coverage=false
• nx test utils --coverage=false
• nx test scope-manager --coverage=false
• nx test type-utils --coverage=false
• nx test rule-schema-to-typescript-types --coverage=false
• nx test repo-tools --coverage=false
• nx test parser --coverage=false
• nx test eslint-plugin-internal --coverage=false
• nx test ast-spec --coverage=false
• nx test eslint-plugin-tslint --coverage=false
• nx run-many --target=typecheck --parallel
• nx run integration-tests:test
• nx run repo-tools:generate-configs

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[JoshuaKGoldberg]

I'll wait to mark these changes as ok to merge until the flat config work lands. They can still be reviewed first though.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f36f682) 86.94% compared to head (f17a99b) 87.74%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8367      +/-   ##
==========================================
+ Coverage   86.94%   87.74%   +0.80%     
==========================================
  Files         252      398     +146     
  Lines       12251    13827    +1576     
  Branches     3861     4067     +206     
==========================================
+ Hits        10652    12133    +1481     
- Misses       1332     1397      +65     
- Partials      267      297      +30     

Flag	Coverage Δ
unittest	87.74% <ø> (+0.80%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

see 146 files with indirect coverage changes

[me4502]

Is it intentional that these aren't visible from the index.ts file that the flat config documentation recommends (so we can't do ...tseslint.configs.recommendedTypeCheckedOnly)?