* test: replace Karma with Webdriver.IO

The current test framework for browser testing (Karma) is not maintained anymore and WebdriverIO provides a more modern stack that allows to test in different browser.

This patch replaces these test frameworks.

fixes: #17009

* update webdriverio deps

* PR feedback

* adjust tests

* build eslint before running tests

* make test file an esm file

* revert more esm changes

* make it work

* remove return value

* custom log dir for wdio tests

* auto detect chromedriver

* bump timeout, store logs

* bump timeout again

* update wdio deps

* update wdio deps

* set log level to trace

* update wdio deps and unskip tests

* no need to have this be an async test

* update deps

* make path spec file explicit

* remove Chromedriver deps

* removed wdio command

* docs: add typescript template

* fix: formatting

* chore: update docs with AndreaPontrandolfo's findings

* Update no-import-assign.md

* chore: update no-redeclare

* fix: update TS code numbers

* feat: cleanup typescript error codes

* Update docs/src/_includes/layouts/doc.html

Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>

* Update docs/src/rules/no-redeclare.md

Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>

* Update docs/src/rules/no-import-assign.md

Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>

* Update docs/src/rules/no-invalid-this.md

Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>

* fix: formatting error

---------

Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>

* feat: add new \`enforce\` option (`lines-between-class-members`)

* test: add cases for enforce with exceptAfterSingleLine option

* docs: add `enforce` option

* docs: fix example

* fix: update schema to make enforce option required

* refactor: remove redundant if condition

* refactor: remove redundant if condition

* docs: add suggestions

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* test: add cases where multiple config objects match a pair

---------

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* feat: Emit deprecation warnings in RuleTester

Emits deprecation warnings when using methods on `context` that are
deprecated.

Refs #17520

* Revert flat-rule-tester

* Fix linting error

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* docs: update `no-promise-executor-return` examples

* docs: update example

* feat: Implement onUnreachableCodePathStart/End

refs # 17457

* Finish up onUnreachable* work

* Refactor to account for out-of-order events

* Update lib/rules/no-unreachable.js

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Update lib/rules/no-unreachable.js

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Update tests/lib/linter/code-path-analysis/code-path-analyzer.js

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Incorporate feedback

* Clean up rules and docs

* Update docs

* Fix code example

* Update docs/src/extend/code-path-analysis.md

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Update docs/src/extend/code-path-analysis.md

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Update docs/src/extend/code-path-analysis.md

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Update lib/rules/consistent-return.js

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Update lib/rules/no-this-before-super.js

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Fix examples

* Add deprecation notices to RuleTester/FlatRuleTester

* Update config

* Add deprecation notices to RuleTester/FlatRuleTester

* Fix lint warning

* Update docs/src/extend/code-path-analysis.md

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Update docs/src/extend/code-path-analysis.md

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Update docs/src/extend/code-path-analysis.md

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

* Fix test

---------

Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>