Migrate repository tooling to Ruff

[harryswift01]

Summary

This PR will migrate the repository's Python linting and formatting tooling to Ruff.

Changes

Update pre-commit configuration:

• Add Ruff linting and formatting hooks.
• Retain rstcheck for Python docstrings.
• Retain the Sphinx documentation check as a pre-push hook.

Impact

• Standardises Python linting and formatting with the organisation-wide Ruff tooling.
• Reduces the number of separate Python development tools and associated configuration.
• Keeps the existing documentation and repository-specific checks in place.