chore: improve code quality and repository standards

[djimit]

This PR adds:

• Add .gitignore

Auto-generated by code quality scanner.

[gemini-code-assist]

Code Review

This pull request introduces a new .gitignore file to manage project dependencies, build outputs, and environment-specific files. Feedback suggests expanding the Python ignore patterns to include individual compiled files and adding common certificate and private key extensions to prevent accidental security leaks.

[gemini-code-assist]

It is recommended to also ignore individual compiled Python files (*.pyc, *.pyo, *.pyd) to ensure the repository remains clean across different environments, even if files are generated outside of the __pycache__ directory.

__pycache__/
*.py[cod]
*$py.class

[gemini-code-assist]

Given the project's focus on government standards and authentication (e.g., PKIoverheid, DigiD), it is a critical security practice to prevent accidental commits of private keys or certificates. Adding common extensions like .pem, .key, .p12, and .pfx to the ignore list helps mitigate this risk.

.env
.env.local
.env.*.local
*.pem
*.key
*.p12
*.pfx

References

1. Preventing the accidental commitment of sensitive information such as private keys and environment variables is a fundamental security requirement.