Add params to override the login and authorize paths

[blittle]

WHY are these changes introduced?

Make overriding the default account paths easier. See #2607

WHAT is this pull request doing?

Expose params to override the paths. Previously this was done by providing a whole handleAuthStatus function. That's still supported for advanced usecases, but I think we should make it easier to just simply change the path. Additionally, the handleAuthStatus wouldn't help in the case someone directly links to the login page. The developer had no way to override the default /account redirect.

HOW to test your changes?

1. Build packages/hydrogen
2. Pull credentials into the skeleton template: h2 env pull
3. Start up the skeleton template with a tunnel: shopify hydrogen dev --codegen --customer-account-push__unstable
4. Make sure that account pages still work.

Post-merge steps

Checklist

• I've read the Contributing Guidelines
• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've added a changeset if this PR contains user-facing or noteworthy changes
• I've added tests to cover my changes
• I've added or updated the documentation

[shopify]

Oxygen deployed a preview of your bl-default-customer-account-route branch. Details:

Storefront	Status	Preview link	Deployment details	Last update (UTC)
Skeleton (skeleton.hydrogen.shop)	✅ Successful (Logs)	Preview deployment	Inspect deployment	December 6, 2024 6:23 PM
classic-remix	✅ Successful (Logs)	Preview deployment	Inspect deployment	December 6, 2024 6:23 PM
third-party-queries-caching	✅ Successful (Logs)	Preview deployment	Inspect deployment	December 6, 2024 6:23 PM
metaobjects	✅ Successful (Logs)	Preview deployment	Inspect deployment	December 6, 2024 6:23 PM
custom-cart-method	✅ Successful (Logs)	Preview deployment	Inspect deployment	December 6, 2024 6:23 PM

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