[DOC]Domain Model - Message transmission model Optimization

[kobe-yang]

Document Optimization:
Message Transmission Model Introduction The introduction to the consumer model is not very clear and complete, and it may be ambiguous to read.

Regarding the original description of point-to-point, I personally feel that this mode is more like a shared messaging pattern. If we change it to the following, readers may find it easier to understand without ambiguity.
After the overall modification, the consumer model can be divided into the following three categories:

• Point-to-Point [The newly added mode is the point-to-point model]
• Publish-Subscribe [Using the previous publish-subscribe model]
• Shared [The previous point-to-point aligns better with this pattern]