ClearCleanup clears a defer function from the thread local.

CreatePluginApiName creates a Clace plugin function.

DeferCleanup defers a close function to call when the API handler is done.

FetchPluginState fetches a value from the thread local for the plugin.

RegisterPlugin registers a plugin with Clace.

SavePluginState saves a value in the thread local for the plugin.

App is the main object that represents a Clace app.

PluginResponse is a starlark.Value that represents the response to a plugin request.