feat(torii-core): optimistically broadcast entity update

[Larkooo]

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Summary by CodeRabbit

• New Features

  • Introduced new structures: OptimisticEntityUpdate, OptimisticEntity, and OptimisticEventMessage, enhancing the entity and event message handling.
  • Updated service methods to work with OptimisticEntity and OptimisticEventMessage, improving message publishing and subscription management.
  • Enhanced the message broker to include a queuing mechanism for better message delivery management.

• Bug Fixes

  • Adjusted conditions to clear children of updated models when applicable, ensuring data integrity.

• Documentation

  • Added comments to clarify the purpose and usage of the new structures and their fields.