Initialize Varbase Auth Base recipe

Problem/Motivation

Varbase previously provided social authentication functionality through the Varbase Social Single Sign-On module (varbase_auth).

To align with the new modular recipe-based architecture in Varbase, social authentication should be migrated into a dedicated base recipe: varbase_auth_base.

Proposed resolution

• Create a new recipe: varbase_auth_base.
• Migrate functionality from the deprecated Varbase Social Single Sign-On module.
• Install and configure the following modules:

• social_api
• social_auth
• social_auth_google

The recipe should:

• Provide default configuration scaffolding for OAuth providers.
• Support Google, Facebook, LinkedIn, and X-Twitter authentication.
• Allow seamless single sign-on using existing social accounts.
• Remain extensible for future providers.

This establishes a clean, modern, and modular authentication foundation for all Varbase-based projects.

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ✅ Automated unit/functional testing coverage
• ✅ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ✅ Code review from 1 Varbase core team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes
• ❌ Release varbase-11.0.0-alpha1, varbase_starter-1.0.0-alpha1, varbase_auth_base-1.0.0-alpha1

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• feat: #3572229 Initialize Varbase Auth Base recipe