feat(reader-revenue): add PayPal Payments gateway to wizard

[dkoo]

All Submissions:

• Have you followed the Newspack Contributing guideline?
• Does your code follow the WordPress' coding standards and VIP Go coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

Adds PayPal Payments to the list of fully-supported payment gateways in the Reader Revenue wizard.

How to test the changes in this Pull Request:

1. Start with a new testing site and install all required WooCommerce plugins (main Woo + Subscriptions).
2. After completing setup, visit Reader Revenue and choose the "Newspack" platform if not already selected.
3. Visit the Payment Methods tab and confirm you see PayPal Payments as an option here, and confirm that the "Learn more" link leads to the correct plugin info page:

4. Enable PayPal Payments and confirm it installs and activates the plugin, then click "Connect" and confirm it leads you to the PayPal Payments plugin's onboarding page.
5. Complete onboarding by connecting to a sandbox PayPal account (instructions)
6. Go back to Reader Revenue > Payment Methods and confirm that the PayPal Payments card now shows it as connected in test mode. Confirm that the "Configure" button leads to the PayPal Payments plugin settings page.

7. Confirm that you can complete a test transaction as a reader via modal checkout using PayPal. Test both with and without covering donation fees.
8. Smoke test enabling and connecting Stripe and WooPayments, all links and buttons within those cards, and completing test transactions using those payment gateways both with and without covering fees, too.

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully ran tests with your changes locally?

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[laurelfulford]

This took me way too long to test because I'm a ding-dong, but everything looks good! I spotted one non-PR-related issue (below) and one minor non-blocking issue 🙂

Not PR-related: when I initially enabled PayPal Payments, "Collect transaction fees" is disabled, but the checkbox appears on the front-end:

This is the same for other payment gateways (like Stripe), and the same on trunk; toggling on and off the setting fixes it so it seems to be some default weirdness!

[laurelfulford]

Thanks @dkoo! I retested the update, and the name is now consistent when the plugin isn't installed, and when it is 🎉

[github-actions]

Hey @dkoo, good job getting this PR merged! 🎉

Now, the needs-changelog label has been added to it.

Please check if this PR needs to be included in the "Upcoming Changes" and "Release Notes" doc. If it doesn't, simply remove the label.

If it does, please add an entry to our shared document, with screenshots and testing instructions if applicable, then remove the label.

Thank you! ❤️

[dkoo]

@laurelfulford I opened a new PR for the transaction fee settings issue you described.

[matticbot]

🎉 This PR is included in version 5.13.0-alpha.3 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀