[#3176] Clean up gitignore
[#3176] Add unit test boostrap
[#3176] Add unit test framework
[#3176] Add webhooks REST API endpoint tests

100% coverage :)
[#3176] Add core function tests
[#3176] Add woocommerce class tests
[#3176] Add readme
[#3176] REST API webhooks endpoint tweaks from unit test
[#3176] Use shop manager role for API tests
[#3176] Refactor bootstrap

* Adjust load and install order
* Fix issue with stale capabilities after install
Merge pull request #6147 from maxrice/feature-3176-unit-tests

Add Unit Testing Suite