add authenticationState api to customer account ui extension

[brianshen1990]

Background

Part of https://github.com/Shopify/core-issues/issues/71278 Add a new API to order status api to indicate which authentication state it is.

Please also review the customer account web side PR https://github.com/Shopify/customer-account-web/pull/4626 , same tophat .

🎩

• go visit https://shopify.renaming.brian-shen.us.spin.dev/3/account/orders/6 => unauthenticated, no extension
• open dev console, execute document.cookie = "order=eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaEpJaVZrTkRneU5XSXdNVFV3WXpKbFpXUXdPVGszTXprellqazJNbVF4TXpNME1BWTZCa1ZVIiwiZXhwIjoiMjAyNC0wNi0xOVQyMDo1Mzo1Ny44NzdaIiwicHVyIjoiY29va2llLm9yZGVyIn19--7b65fadc7e53ff713ac912d8056ae30018000ce6; Path=/3/account/orders/6" , refresh => extension show, as pre-authenticated
• login with dev@shopify.com and this identity mailer , extension loads, and show as fully_authenticated

Checklist

• [x] I have :tophat:'d these changes
• [x] I have updated relevant documentation

[brianshen1990]

🎩 and code LGTM! Are we going to update the api docs with this change as well?

yep, the first sentence of the description of customer account web side https://github.com/Shopify/customer-account-web/pull/4626 ~~ docs on the way~~