Adding duo authentication

[Jenn738]

Problem

This PR adds support for Duo authentication.

Check off any of the following areas of code that are modified:

• authentication / authorization
• workflow
• lifecycle SDK
• datastore abstractions

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• [ x] New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Refactoring (code changes that neither fix bugs nor add features)
• Documentation update
• Dependency update
• Performance improvement
• Security fix

[ekline]

@ekline-ai The p0 login documentation at p0-docs/p0-cli/p0-commands-and-usage/p0-login.md lists supported SSO providers (Google, Okta, Ping, Microsoft) but does not include Duo, which this PR adds as a new authentication provider. Update the "Supported SSO Providers" section and the overview line to include Duo.

Create a new branch from the default branch and open a separate pull request with the documentation changes.

[ekline]

EkLine Docs Agent is working on this update. You can view the progress at EkLine Editor.

[ekline]

Documentation PR created: p0-security/p0-docs#82

Changes made to p0-cli/p0-commands-and-usage/p0-login.md:

• Added Duo to the overview line listing identity providers
• Added * **Duo** to the "Supported SSO Providers" section

This is a separate PR on the p0-docs repo (branch docs/add-duo-sso-provider), keeping the documentation changes independent from the source code PR p0cli#376.