* Add annotations to files under core/events
* Add annotations to files under core/interfaces
* Add annotations to files under core/keyboard_nav
* Add annotations to files under core/renderers
* Add annotations to files under core/serialization
* Add annotations to files under core/theme
* Add annotations to files under core/toolbox
* Add annotations to files under core/utils
* Add annotations to files under core
* Renamed Blockly.connectionTypes to Blockly.ConnectionType
* Renamed core/connection_types.js to connection_type.js
* Add entry to renamings.js for renaming of Blockly.connectionTypes
Co-authored-by: Christopher Allen <cpcallen+git@google.com>