Feedback on readme instructions

[carolinan]

In the instructions for running the tool locally, at the end, it says:
The tests run on files within the /test-theme folder.

This needs to be listed as an action before Run npm run start. because it is easy to miss.

It needs to be clearer that the theme files needs to be placed directly in the test-theme folder:
theme-review-action/test-theme/functions.php
not theme-review-action/test-theme/twentytwentyone/functions.php

-Is there anything preventing this folder from existing when you clone the tool?
Why does the test-theme folder need to be created manually, when the folder is required?

Or is this a situation where it only needs to be created manually on Windows because of #18 ?