E2E testing with Cypress

[iamdharmesh]

Description of the Change

This PR removes wpacceptance tests and Adds end-to-end testing with Cypress to follow OSBP guide. Test runs automatically on every pull request to the develop branch.

Steps to perform local testing or develop new tests:

1. Install dependencies npm install
2. Start wp-env local development suite npm run env:start
3. Run cypress npm run cypress:run or open developer browser npm run cypress:open

Closes #333

Verification Process

GitHub Actions workflow "E2E test", expected to pass the test. Refer to "Description of the Change" for local testing.

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Changelog Entry

Added - End-to-end testing with Cypress

Credits

Props @iamdharmesh

[faisal-alvi]

LGTM 🚀 great work @iamdharmesh, just asked a question + a super minor extra line issue + .gitignore conflict, please have a look.

[faisal-alvi]

🚀

[iamdharmesh]

@jeffpaul please help to remove wpa GH action from the required list, as we already replaced it with cypress and its blocker for merging the PR.

Thanks.

[jeffpaul]

@iamdharmesh done