fix(types): fix Actions type definition

Fix definition of type which represent message actions received from history and list of users which added action of specific type and value to the message.

Closes #407

refactor(types): remove indexed signature for publish

Remove redundant indexed signature from publish message parameters type definition.

Closes #413

refactor(types): add serializable objects to `Payload` type

Extend `Payload` type definition with objects which can be serialized by `JSON.stringify` using `toJSON()` methods.

Closes #412

refactor(types): aggregate generated types definitions

Aggregate multiple types definitions into single type definition type with proper type names and namespaces.

Closes #405 #409 #410

refactor(types): add missing Subscribe Event Engine types

Add Subscribe Event Engine and Event Listener types to the bundled types definition file.

Closes #377

Author: parfeon