feat(organization): add new check organization_members_mfa_required

[HugoPBrito]

Context

Requiring Multi-Factor Authentication (MFA) enhances the security of GitHub organizations by adding an extra layer of protection against account compromise. Password-only authentication poses risks, as compromised credentials can expose repositories to malicious code, data theft, or other unauthorized actions. Enforcing MFA mitigates these risks, ensuring that even if a password is stolen, unauthorized access is significantly more difficult.

Description

This check ensures that all members of a GitHub organization are required to enable Multi-Factor Authentication (MFA) for their accounts. By implementing this requirement, organizations can enforce higher security standards, protecting repositories and sensitive data from unauthorized access and potential compromise due to credential theft.

Checklist

• Are there new checks included in this PR? Yes.
  • If so, do we need to update permissions for the provider? No.
• Review if the code is being covered by tests.
• Review if code is being documented following this specification https://github.com/google/styleguide/blob/gh-pages/pyguide.md#38-comments-and-docstrings
• Review if backport is needed.

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.