Create the complete snapshot of the webview.

Create a view that only contains logs since the given checkpoint.

TODO(nick): We should build this from the Tiltfile in the apiserver, not the Tiltfile state in EngineState.

Converts an EngineState into a list of UIResources.

Converts EngineState into the public data model representation, a UISession.

The "Ready" condition is a cross-resource status report that's synthesized from the more type-specific fields of UIResource.

The "UpToDate" condition is a cross-resource status report that's synthesized from the more type-specific fields of UIResource.

We call the main session the Tiltfile session, for compatibility with the other Session API.