Refactor message handler to use unified MatlabSimulator

[marcomelloni]

Summary

• define new MatlabSimulator interface and specific implementations
• update message handler to start simulations through the new classes
• keep compatibility exports for existing tests

Testing

• pip install -e . (fails: could not access pypi)

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https://chatgpt.com/codex/tasks/task_e_688200831fb4833387c0bd4e23fd94e4

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 55.28455% with 55 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
agents/matlab/matlab_agent/src/core/simulator.py	43.13%	29 Missing ⚠️
agents/matlab/matlab_agent/src/core/interactive.py	13.63%	19 Missing ⚠️
.../matlab_agent/src/comm/rabbitmq/message_handler.py	66.66%	5 Missing ⚠️
...matlab_agent/src/comm/rabbitmq/rabbitmq_manager.py	86.66%	2 Missing ⚠️

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