Include installation steps for Ruff in guide

Added installation instructions for Ruff linter.

Author: mjobidon

content/guides/python/lint-format-typing.md

@@ -24,6 +24,14 @@ In this section, you'll learn how to set up code quality tools for your Python a
 
 Ruff is an extremely fast Python linter and formatter written in Rust. It replaces multiple tools like flake8, isort, and black with a single unified tool.
 
+Before using Ruff, install it in your Python environment:
+
+```bash
+pip install ruff
+```
+
+If you're using a virtual environment, make sure it is activated so the `ruff` command is available when you run the commands below.
+
 Create a `pyproject.toml` file:
 
 ```toml
@@ -119,4 +127,4 @@ These tools help maintain code quality and catch errors early in development.
 
 - [Configure GitHub Actions](configure-github-actions.md) to run these checks automatically
 - Customize linting rules to match your team's style preferences
-- Explore advanced type checking features
+- Explore advanced type checking features