Add Pre-commit Configuration Page to Data Handbook

[simonprydden]

User Story:

As a data engineer,
I want a dedicated page in the data handbook that outlines the recommended pre-commit configuration,
so that I can easily set up a consistent and standardized development environment, which promotes code quality and reduces integration issues.

Acceptance Criteria:

• A new page named "Pre-commit Configuration" exists in the data handbook.
• The page clearly explains the purpose of pre-commit hooks for data projects.
• The page lists the recommended pre-commit hooks for our project (e.g., black, flake8, isort, mypy).
• The page provides example .pre-commit-config.yaml content, reflecting the recommended hooks and settings.
• The page includes clear instructions on how to install and enable pre-commit hooks.