Products Onboarding: Integrate Template Endpoint

[Ecarrion]

Closes: #7920

Why

This PR makes sure that after selecting a product template the app:

• Shows a loading screen
• Cretes & fetch the template product
• Displays the template product

Note: Refining on the product form for the template(auto-draft) product will come in a next PR #7949

How

• Call Yosemite action to create and fetch a template product.
• Show loading view controller while the remote request is being performed.
• Show error notice if any error occurs.
• Show product form if template creation is successful.

Demo

template.mov

normal.mov

Testing

• On a store with less than 3 products, go to the products screen
• Tap on the add a product CTA
• Select Template & a product type
• See that you are navigated to the template product.

Note: Updating the product and making sure it all works & looks correctly will come in a later PR

---

• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[wpmobilebot]

You can test the changes from this Pull Request by:

• Clicking here or scanning the QR code below to access App Center
• Then installing the build number pr7992-5269f3e on your iPhone

If you need access to App Center, please ask a maintainer to add you.

[rachelmcr]

This looks great for most cases! I just ran into one problem where I'm blocked when the template request fails (details in comment).

[rachelmcr]

What do you think of moving this line to above the switch statement, to make sure the loader is dismissed in both success and failure cases? Right now, if the remote request fails the loader view is never dismissed:

[Ecarrion]

Nice catch! fixed in 5269f3e

error-demo.mov

[rachelmcr]

🚀