* Added new ComponentEventBus, combined it with IEventBus.
* Removed all traces of IEntity from ComponentDependencies.
Removed IEntityManager dependency from ComponentManager.
* Added entity create/delete events to IEntityManager.
* ComponentEvents now use EntitySystemMessages instead of their custom ComponentEvent class.
* Component events are now just overloads of entity events.
* Removed obsolete EntitySystemMessage, now everything uses the base EntityEventArgs.
* Add a bool argument for if the message should be broadcast as well as directed.
Fix ordering and init issues of events in EntityManager.
* Changed names from Component/Entity events to Directed/Broadcast.
* Fix bugs and unit tests.
* Added a basic server simulation framework for help with tests.
* Moved as much as possible to Robust.Shared/Containers.
Moved ContainerSlot from content to engine.
* Moved ClientContainer to shared.
* Merged client/server ContainerManagerComponents into a single shared version.
* ContainerManagerComponent is now implicitly registered with the attributes.
* Migrated to 2021 serialization technology.
* Existing Unit Tests work.
* More tests coverage.
Fixed bug with transferring items between containers.
* Container Type info is now sent over the network.
* Merge client/server container systems.
* Code cleanup.
* Attempted to fix dictionary serialization.
Logs warning when trying to check if an unknown GridId is paused.
* Remove OldCode.
