Check architecture.jl, NATSBridge.jl and its test files:
- test_julia_to_julia_table_receiver.jl
- test_julia_to_julia_table_sender.jl. 

Now I want to test sending a mix-content message from Julia serviceA to Julia serviceB, for example, a chat system. 
The test message must show that any combination and any number and any data size of text | json | table | image | audio | video | binary can be send and receive.

Can you write me the following test files:
- test_julia_to_julia_mix_receiver.jl
- test_julia_to_julia_mix_sender.jl




1. create a tutorial file "tutorial_julia.md" for NATSBridge.jl
2. create a walkthrough file "walkthrough_julia.md" for NATSBridge.jl

You may consult architecture.md for more info.