add ruff

python/code_quality/ruff/README.md

+## Objective
+
+Run [Ruff](https://github.com/ruffle-rs/ruffle), an extremely fast Python linter, on your Python
+code. This tool is written in Rust, and it is designed to quickly analyze your Python code to detect
+various syntax and stylistic errors.
+
+## How to use it
+
+1. Configure the `pyproject.toml` file in your repository's root directory with your desired rules.
+2. Include the Ruff template in your GitLab CI/CD configuration.
+3. If you need to customize the job, refer to
+   the [jobs customization](https://docs.r2devops.io/get-started/use-templates/#job-templates-customization)
+   documentation.
+
+### Global Configuration of Ruff
+
+To add configuration to `ruff` that is shared with any other usage of Ruff (such as manual run,
+pre-commit, etc), you can use a `pyproject.toml` configuration file in your project's root
+directory. Learn more about [ruff configuration](https://beta.ruff.rs/docs/configuration/) files.
+
+## Add a <a href="https://github.com/ruffle-rs/ruffle"><img alt="Code style: Ruff" src="https://img.shields.io/badge/Ruff-Linter-blue"></a> Badge to your project README.md
+
+To display the use of Ruff in your project, you can add the following badge to your README.md:
+
+```markdown
+<a href="https://github.com/ruffle-rs/ruffle">
+    <img alt="Code style: Ruff" src="https://img.shields.io/badge/Ruff-Linter-blue">
+</a>
+```

python/code_quality/ruff/ruff.yml

+ruff:
+    image: python:latest
+    stage: code_quality
+    script:
+        - python --version  # Debug
+        - python -m venv venv --upgrade-deps || python -m venv venv  # upgrade-deps is not supported before 3.9
+        - source venv/bin/activate
+        - pip install ruff
+        - ruff
+    only:
+        changes:
+            - ./**/*.py
+            - .gitlab-ci.yml
+            - pyproject.toml

ruff.r2.yml

+files:
+    template: ./python/code_quality/ruff/ruff.yml
+    documentation: ./python/code_quality/ruff/README.md
+data:
+    description: "Run ruff on your repository"
+    icon: 💎
+    public: true
+    labels:
+        - Lint
+        - Utilities
+        - Code Quality
+        - Python
+    license: MIT
+    deprecated: false