Checking the event bus in the AddDomainEventBus method should be changed to a warning instead of a direct error

[zhenlei520]

Description

Not all projects will use the integrated event bus and local event bus when using DDD. They can inform users through warnings instead of throwing errors directly. The same is true for the unit of work. It should be unordered when registering. It can be changed to log warning consumers by mandatory checking that it must be registered before AddDomainEventBus

.NET version

.NET 6.0