Add support for complex types in dictionaries and lists

[mariajgrimaldi]

Description

Building on the previous PR that introduced support for dictionaries with primitive types, this proposal aims to extend support to more complex types in lists and dictionaries. This will ensure that events with content such as dictionaries of lists, lists of dictionaries, and lists of data attribute classes are fully supported. These changes will enable the handling by the event bus of events like:

• org.openedx.learning.discussions.configuration.changed.v1
• org.openedx.content_authoring.course.certificate_config.changed.v1
• org.openedx.content_authoring.course.certificate_config.deleted.v1
• org.openedx.learning.course.notification.requested.v1
• org.openedx.learning.ora.submission.created.v1

Definition of Done

• A decision is reached on the proposed changes: are we committing to implementing them?