Post-purchase Migration Experience: Handle selecting a DIFM site in the Sites dashboard that has started migration

[donnapep]

Description

When a user clicks on a site in the Sites dashboard that has the migration-started-difm sticker, display a detailed Overview communicating what the user can expect.

Figma - nOWSHCjXMpB5sXHthTVdvK-fi-3949_19811

[renatho]

I suspect it's probably better to wait for #95379 before working on this one because they will probably share part of the logic. We could start in parallel the component of the content though.

[Imran92]

Moving it to blocked till this #95379 one gets completed

[renatho]

When working on this, we could remove this check, and also implement this logic in the MigrationOverview (maybe splitting it between pending and started?).

[renatho]

Moving it to blocked till this #95379 one gets completed

#95497 is done and is just waiting for translations. So we could work on this issue based off of that branch.

UPDATE: Now I worked on this PR and did some refactor. So I suggest working on this issue based on that. See this comment.

UPDATE 2: If that PR is not approved yet, you would be nice to start with a review there, so we could make sure it won't change before starting the work on this issue. ;)