* refactor: Rename AggregateTurnMessagesExecutor
* feat: Rework Agent Hosting for Configurability and HIL support
* Adds support for selecting whether updates and/or full responses are
emitted to events
* Adds support for HIL/FunctionCalls (including interception)
* Implements internal support for ExternalRequests from any executor
(not just RequestPort)
* test: Add tests for new AIAgentHostExecutor functionality
* feat: Unify non-Handoff Agent Hosting
* doc: More explicit documentation for `overwrite` in RouteBuilder
* refactor: Unify ExecutorIsh and ExecutorRegistration => ExecutorBinding
* Switch to more modern Record type-tree for Sum Types
* Unify APIs for getting ExecutorBinding
* Fix an issue where workflows consisting entirely of cross-run shareable executors which are not instance-resettable do not properly clear state when running non-concurrently.
* feat: Simplify function-to-executor pattern
* refactor: Normalize API naming