docs: add debug unit test command into package.json (#501)

* test: add debug unit test command into package.json

* Update README.md

Co-Authored-By: Thibaut Sardan <33178835+Tbaut@users.noreply.github.com>

* Update README.md

Co-Authored-By: Thibaut Sardan <33178835+Tbaut@users.noreply.github.com>

* Update README.md

Co-Authored-By: Thibaut Sardan <33178835+Tbaut@users.noreply.github.com>
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