doc: Add git more info to the readme.

PR-URL: #1
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Nicola Del Gobbo <nicoladelgobbo@NickNaso.local>

Author: mhdawson

README.md

@@ -1,2 +1,8 @@
 # napi-test-suite
 N-API Test Suite
+
+This repository holds a copy of the N-API test suite so that it can be used to validate N-API
+implementations outside of Node.js
+
+Currently we are still working on the process to extract the test suite and publish it to this
+repo on a regular basis.