chore: setup pre-commit

[iraedeus]

No description provided.

[Copilot]

Pull Request Overview

This PR sets up pre-commit hooks for the project to automate code quality checks before commits. The changes include adding pre-commit configuration, updating CI workflows, and applying automatic formatting fixes across test files.

• Adds pre-commit configuration with hooks for code formatting (ruff), linting, type checking (mypy), and basic file checks
• Updates GitHub Actions workflow to use pre-commit instead of individual tool runs
• Applies automatic import sorting and whitespace formatting fixes across multiple test files

Reviewed Changes

Copilot reviewed 35 out of 38 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.pre-commit-config.yaml	Adds pre-commit configuration with ruff, mypy, and basic file validation hooks
.github/workflows/check.yml	Updates CI workflow to use pre-commit and newer action versions
pyproject.toml	Updates ruff configuration and adds type stub dependencies
CONTRIBUTING.md	Adds mandatory pre-commit setup instructions for contributors
Multiple test files	Applies automatic import sorting and whitespace cleanup
docs/source/index.rst	Removes trailing whitespace