Message builder

[johnameyer]

• [ ] Due to https://github.com/microsoft/TypeScript/issues/50715, we cannot rely on documentation being copied for mapped types. As such, we will have interfaces for all message types and validation / cloners duplication only on the response messages.
• [ ] How to use the cloners provided in the message definition to regenerate? (i.e. validate poorly formed input)
• [ ] How to express union StatusMessage / ResponseMessage less verbosely
• [x] Keep news? Expand out fields onto message?
  • Keeping news for now
  • Keeping fields in payload
• [ ] How to have documentation included on mapped properties?
• [ ] How to have logical documentation for the built type?

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: 12587a3827188b34a2a613057ff9bc28c3c9c988

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR