feat: Support for Customizable OpenID Profile Fields via Environment Variable

[rubentalstra]

Summary

Closes #4362
#4354

Docs: LibreChat-AI/librechat.ai#205

This Pull Request introduces comprehensive OpenID Connect (OIDC) support. The key changes include:

• Environment Configuration: Updated .env.example to include new environment variables required for OpenID integration.
• User Schema Enhancements: Modified userSchema.js to accommodate additional fields for OpenID data, ensuring seamless user management.
• Data Mappers Implementation: Added openidDataMapper.js with provider-specific data mappers for Microsoft, AWS Cognito and Keycloak to handle custom OpenID data effectively.
• OpenID Strategy Configuration: Enhanced openidStrategy.js to utilize the new data mappers, enforce role-based access control, and manage user avatars based on OpenID data.
• Dependency Updates: Updated package.json and package-lock.json to include necessary libraries for OpenID functionality.
• Type Definitions: Updated TypeScript types in types.ts to support custom OpenID data mappings.

Change Type

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Testing

currently only the Microsoft provider tested and full working.

Checklist

• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• I have commented in any complex areas of my code
• I have made pertinent documentation changes
• My changes do not introduce new warnings
• I have written tests demonstrating that my changes are effective or that my feature works
• Local unit tests pass with my changes
• A pull request for updating the documentation has been submitted.

[rubentalstra]

@danny-avila i read your comment on a different pull request regarding a generic method for determining custom data from different openID providers.

Is this going in the right direction? I would love to get some feedback to contribute to this amazing project.