#3786479 Checkout: add summary features for each of the WP.com plans (1)

In #42854 we added plan features to the Checkout summary for the business plan. This adds features for all active WordPress.com plans.

All Plans:

• “Free domain for one year” unless a domain is in the cart, then the bundling message will be on the domain line item

Personal:

• Remove WordPress.com ads
• Limit your content to paying subscribers

Premium:

• Unlimited access to our library of Premium Themes
• Subscriber-only content and simple payment buttons
• Track your stats with Google Analytics

Business:

• Install custom plugins and themes
• Drive traffic to your site with our advanced SEO tools
• Track your stats with Google Analytics
• Real-time backups and activity logs

Ecommerce:

• Install custom plugins and themes
• Accept payments in 60+ countries
• Integrations with top shipping carriers
• Unlimited products or services for your online store
• eCommerce marketing tools

To test:

• add a plan to your cart and visit Checkout with ?flags=composite-checkout-testing
• verify that the checkout summary has the correct features
• switch plan variation and verify that the features remain
• add a domain and verify that the “Free domain for one year” feature is removed (a separate domain item should be seen)
• repeat for other plans