Add check for supported engines to import CaptureStep

[daledupreez]

Proposed Changes

• This PR ensures that we support the specified import platform before we redirect to the preview step in import flows.

Testing Instructions

• Run this branch locally or via Calypso.live
• Navigate to /setup/import-hosted-site
• On the screen asking for your site address, enter a site built with Godaddy's site builder (which should be hosted at *.godaddysites.com)
• Verify that you are taken to a screen that indicates we don't support imports from that platform

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• Have you written new tests for your changes?
• Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• Have you checked for TypeScript, React or other console errors?
• Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• Have we added the "[Status] String Freeze" label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
• For changes affecting Jetpack: Have we added the "[Status] Needs Privacy Updates" label if this pull request changes what data or activity we track or use (p4TIVU-aUh-p2)?

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-107395

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-107395&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-107395&env=a8c-for-agencies

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~544 bytes added 📈 [gzipped])

name                     parsed_size           gzip_size
import-hosted-site-flow       +133 B  (+0.0%)     +358 B  (+0.2%)
import-flow                   +133 B  (+0.0%)     +286 B  (+0.0%)
import                        +133 B  (+0.0%)     +258 B  (+0.2%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[andres-blanco]

This doesn't seem to fix the issue

Screen.Recording.2024-05-13.at.09.14.05.mov

[daledupreez]

@andres-blanco, did you follow the flow from the start? It shouldn't take you to the preview step after entering the URL -- you should end up on a step saying that we can't import your content.

[andres-blanco]

did you follow the flow from the start? It shouldn't take you to the preview step after entering the URL -- you should end up on a step saying that we can't import your content.

nope, direct link. When going through the whole flow I get to the expected screen:

[andres-blanco]

This LGTM. Noting that we should consolidate the list of supported importers, more on this in this thread p1715595249244569-slack-C0Q664T29

[daledupreez]

I created #90635 to track the divergent lists of available importers.