Merge pull request #187 from ckeditor/ci/3756

Other (generator): Replaced Karma with Vitest as the testing framework in the generated package.

Other (tools): Removed support for the `--coverage` (`-c`) and `--source-map` (`-s`) flags.

Other (tools): Removed `test` script from the tools, because unit tests in the generated package are executed now directly by Vitest.

MINOR BREAKING CHANGE (generator): The generated package no longer uses Karma as the test runner. Instead, Vitest is used.

MINOR BREAKING CHANGE (tools): The `test` script is removed, because unit tests in the generated package are executed directly by Vitest. Hence, the previous custom support for the `--coverage` (`-c`) and `--source-map` (`-s`) flags is no longer needed and has been also removed. The `yarn run test` (or `npm run test`) script is still available in the generated package, but it executes Vitest. See [CLI flags](https://vitest.dev/guide/cli.html) supported in Vitest.

.gitignore

@@ -1,6 +1,5 @@
 .nyc_output/
 coverage/
 node_modules/
-yarn.lock
 .idea
 /release/