Notify of any breaking changes to make it easier for folks to update their apps

[kevmodrome]

Describe the problem

There have been some requests for a way to get notified of breaking changes in kit. I'd argue we wouldn't need to care about it until 1.0 but I'm forwarding the request anyway.

Describe the proposed solution

A quick way to solve this would be to add some kind of (breaking change) message in the changeset. Using #3670 as an example: Add App namespace for app-level types (breaking change).

Alternatives considered

• Do nothing

Importance

nice to have

Additional Information

• None

[dominikg]

there is breaking change which highlights at least some

[Conduitry]

We've been inconsistent about including "breaking change" next to changelog entries. It would probably be a polite thing to do,

[bluwy]

We do have the Breaking: text in the changeset to note it's a breaking change. But yes it seems like some breaking changes are not prefixed with it, e.g. #3674 too

[Rich-Harris]

We're getting better about adding [breaking] to changesets. I think that's probably the best we can do until we hit stable, so I'll close this