* chore(refactor): tests use vitest and msw
* fix(directory): Ensure filenames conform to eslint requirements
* chore(yarn): Specify node engine version
* fix(yarn): use the proper nodelinker
* fix(GitHub workflow): yarn install with caching
* docs(README): update to match changes
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Co-authored-by: Gergő Jedlicska <gergo@jedlicska.com>