[dvsim] Modernise Python code

[Timmmm]

Description

Would you guys be open to changes to modernise the extensive Python code in OpenTitan? This is normally my minimum bar for making working with Python tolerable:

• Static type hints, validated with Pyright (Mypy is not very good).
• Typer for argument parsing.
• Autoformatting via Black or Ruff (maybe you already have this, I'm not sure).
• Use uv for project management (instead of requirements.txt). I'm not sure what the state of this is since you have both pyproject.toml and python-requirements.txt.

If I make PRs for those would they be accepted?

[jwnrt]

Ping @machshev who is taking dvsim out of tree and interested in python improvements
https://github.com/lowrisc/dvsim