[Arc] Introduce a Python simulation script generator for arcilator

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Hi,

In #7929 , I refactored the C++ header generator Python script for the C++ code that wants to call the LLVM IR produced by `arcilator`. The PR mainly refactors its structure, paving the way for future modularization.

The reason for making it modular is that the script contains some core functions that can serve as a reusable library for other scripts. My proposals are as follows:

1. **Splitting the C++ header generator script**
- **Core module**: Extract the generic logic for interacting with arcilator's state json and encapsulate it into a standalone Python module.
- **Header file generator**: Import core module and only do things around generating C++ headers.

2. **Introducing a Python simulation script generator**
- Develop a Python script that utilizes the core module to generate Python simulation scripts. These scripts will use `llvmlite` to execute the LLVM IR generated by `arcilator`.
- The generated scripts will provide a simulation interface inspired by Chisel, including `poke` and `peek` methods. The generated scripts is like the generated C++ header and is used by other testbenches written in Python.
- Possible use cases: Enable rapid functional validation of circuits with minimal effort, leveraging Python’s expressive syntax for quick and intuitive simulations. With a Python interface, users could efficiently automate simulation workflows and write high-level test scripts.

Before proceeding, I would greatly appreciate your feedback on this proposal.

Thank you for your time and guidance!

Regards

Start by reviewing the C++ header generator Python script and the refactor in #7929, then determine how its reusable arcilator state-JSON logic could become a core module. Assess the proposed llvmlite-based simulation script and its poke/peek interface with the project maintainers; done requires an agreed scope and design for generated Python testbench scripts.

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