* Renamed package simple.workflow.library.adapter to simple.workflow.library.bridge
* Renamed LibraryAdapter -> LibraryBridge.
* Added JointJsLibraryBridge as JointJS bridge for native -> internal transformer.
* Refactored library_manager.py to load library, catalogs, and workflows concurrently.
* Removed library, catalog, and workflow metadata attribute 'version' in favor of using 'id' for versioning.
* Refactored build_catalog and build_library to accept child elements by id instead of the constructed object.